成人高清视频在线观看-成人高清视频免费观看-成人高清免费-成人高清护士在线播放-亚洲www美色-亚洲wwwwww

技術文章

我的位置:首頁  >  技術文章  >  反應釜的使用須知

P產品分類RODUCT CATEGORY

反應釜的使用須知

更新時間:2020-11-25      瀏覽次數:4903

在使用設備前須知

Please carefully read the following information before operation.

微型反應釜適合少量樣品的反應,是昂貴或低產量原材料樣品測試的理想反應裝置。廣泛用于催化反應,加氫反應 與高分子合成等反應,涵蓋石油化工、化學、制藥、高分子合成,冶金等諸多領域。

 Micro reactor, suitable for the reaction of a small amount of samples, is a perfect reaction device to test expensive or low-yield material samples. It is widely used in catalytic reaction, hydrogenation reaction and polymer synthesis reaction in petrochemical, chemical, pharmaceutical, polymer synthesis and metallurgy industries.

適用于氣液兩相 液液兩相 放熱反應 組成測試 穩定性測試 腐蝕性測試 精細化工 超臨界反應 催化劑評價等應用領域。

It is applicable to gas-liquid/liquid-liquid reaction, exothermic reaction, composition test, stability test, corrosion test, fine chemistry, supercritical reaction and catalyst evaluation.

主要特點

Main Features

釜體采用優質不銹鋼316L材質(非標材質可定制),壓力顯示,防爆膜,進、出氣閥設置,功能齊全。

The reactor body is made of high quality stainless steel 316L (Customizable for non-standard materials), and pressure display, explosion-proof membrane and inlet/outlet valves are provided with complete functions.

專門發的“微電腦處理器+三級PID”控制系統,相校與傳統反應釜控制方式,具有控更小的溫度超溫、更快的穩定時 間、更好的控溫精度等優點。

Compared with traditional reactor control mode, the "microcomputer processor + 3-stage PID" control system, which is independently developed, is featured by smaller over-temperature control, faster stable time and better temperature control accuracy.

雙環控制,攪拌速度準確——攪拌采用速度環、電流環雙環控制,加減速度時間設定,電機功率設定,故障報警功能。

Dual-loop control and accurate mixing speed: Speed loop and current loop are used for mixing, including speed/time setting, motor power setting and fault alarm functions.

 產品經第三方機構測試,抗干擾性能符合工業條件下電磁兼容的要求。

The product has been tested by the third party agency and its anti-interference performance meets the electromagnetic compatibility requirements under industrial conditions.

 

 1.實驗室嚴禁煙火并需配備滅火設備。

Fire is strictly prohibited in the laboratory and fire-fighting equipment must be provided.

 2.實驗過程中若有易燃易爆氣體產生,實驗室中所有電器必須是防爆的,實驗工作人員不可穿帶釘皮鞋,以防止打火花,建議穿膠鞋或布鞋。

In case flammable and explosive gas is produced during the test, all electrical appliances in the laboratory must be explosion-proof. The test staff shall not wear leather shoes with nails in order to prevent sparks. Rubber or cloth shoes are recommended.

 3.請仔細了解用戶應承擔的義務和責任。

Please fully understand the obligations and responsibilities of users.

 4.任何使用高壓反應釜的實驗人員,需在仔細閱讀使用手冊后,方可允許上崗位操作,并在實驗過程中,不得擅自離崗。應嚴密監視操作過程中的溫度和壓力變化,以便在發生超 溫或超壓情況之前,及時采取斷電和卸壓等應急措施,防止事故發生。注意溫度在攝氏100度之內,容器內的壓力接近 一個大氣壓,攝氏100以后開始壓力上升較慢,但此時容器的壓力為溫度的3次方函數,到攝氏200度以后,壓力上升會非常快,若無人值守,極易造成事故。

Any test staff using high pressure reactor can only operate after reading this manual carefully and shall not leave without permission during the test. Closely monitor the temperature and pressure changes during the operation so as to prevent the accident by means of power cut and pressure relief in time before the occurrence of over temperature or overpressure.  Please note that if the temperature is within 100 , the pressure in the reactor is close to one atmospheric pressure. After  100  or above is reached, the pressure will rise slowly. The pressure in the reactor is a cubic function of the temperature. After it reaches 200  or above, the pressure will rise very quickly. If no one is available, it is very easy to cause the accident.

 5.若果用戶要在容器中加入有壓力的氣體,建議先加溫,后加壓。但氣壓源的壓力應超過此時容器中的壓力,否則容器中的壓力會反沖向氣壓源,為避免反沖發生,建議充氣 管路中加一個單向閥,如果用戶要先加壓后加溫,則應考慮到在加溫時這部分氣體的壓力會成倍上升,在攝氏300度時有可能上升10倍。再加上容器內液體的飽和蒸汽壓,極易 造成容器超壓。此時若無人值守,極易造成超壓事故。

The user is willing to add pressurized gas into the reactor, it is recommended to raise the pressure after heating. However, the pressure of the air pressure source shall exceed the pressure in the reactor; otherwise the pressure in the reactor will recoil at the air pressure source. In order to avoid recoil, it is recommended to add a one-way valve in the supply line. If the user wants to heat up after pressurization, it shall be considered that the pressure of this part of gas will be multiplied during the heating, and it may rise 10 times at 300. In addition, the saturated vapor pressure in the reactor can easily cause overpressure. If no one is available at this time, it is easy to cause the overpressure accident.

 

6.容器的工作溫度和工作壓力中任何一項都不得超過合同上規定的指標。用戶有責任對其將進行的化學反應體系的溫度、壓力、物理和化學性質進行全面的調研,以保證所選擇的反應條件是在購置的反應釜的安全限定操作條件內。

Neither the max. working temperature nor the max. working pressure of the reactor shall not exceed the value specified in the contract. The user has the responsibility to carry out the research on the temperature, pressure, physical and chemical properties of the chemical reaction system so as to ensure that the selected reaction conditions are within the safe operating conditions of the purchased reactor

 7.用戶有責任正確選擇工作介質和試驗過程中化學反應的性質,保證不損壞設備或造成人身事故,巖征對此不負任何責任,因為他們并不知道用戶要做什么試驗。如果要使用腐蝕性介質,用戶必需能抗腐蝕的供應容器。嚴禁使用具有爆炸性的試驗介質或選擇具有爆炸反應的化學反應試驗。注意,爆炸性的反應,防爆片可能來不及破裂,容器就被破壞了。

User shall select the correct working medium and the nature of chemical reaction during the test, make sure not to damage the equipment or cause personal injury. Yansheng is not responsible for that, because it does not know what test the user is going to do. If corrosive media are to be used, the user must provide corrosion-proof reactor. It is forbidden to use explosive medium or choose the chemical test with explosive reaction. Please note that in case of explosive reaction, the reactor will be damaged before the rupture disk bursts in time.

 8.請注意,允許的工作壓力應低于70%的防爆片的爆破壓力,而不要大于或等于防爆片的爆破壓力。巖征是根據用戶要求的工作壓力選擇防爆片的爆破壓力的。當容器壓力 超過用戶要求的工作壓力時防爆片就會破裂。

Please note that the maximum working pressure shall be less than 70% of the burst pressure of the rupture disk, not greater than or equal to the burst pressure of the rupture disk. Yanzheng selects the burst pressure according to the working pressure required by the user. When the pressure of the reactor exceeds such working pressure, the rupture disk will burst.

 9.有18中基團會引起爆炸反應:

9. There are 18 chemical groups to cause the explosive reaction:

·乙炔化物-Acetylide

·氧化銨-Amine Qxide

·疊氮化物-Azide

·氯酸鹽-Chlorate

·重氨基-Diazo

·重鹽-Diazonium

·次石鹽-Hypohalite

·硝酸鹽-Nitrate

·亞硝酸鹽-Nitrite

·含硝基的化合物-Nitro

·Nitrozo

·臭氧化物-Qzonide

·雷酸鹽-Fuiminate

·高酸-Peracid

·N-胺鹵化物N-Haloamine

·過氯酸鹽-Per chlorate

·過氧化氫物-Hydroperoxide

·過氧化氫-peroxide

 10.在開始使用高壓容器前必需考慮到以下問題:

User must consider the following questions before using the high pressure reactor:

 你從事的化學反應是否為放熱反應?反應過程中如果產生大量的熱則會突然劇烈的升高容器內的壓力,使容器發生破壞。

Is the chemical reaction you are doing in is exothermic? If a large amount of heat is generated during the reaction, the pressure in the reactor will be suddenly and violently increased to damage the reactor.

你從事的化學反應會有什么副產品產生?它們有什么特性(易燃,易爆,有毒等等)?

What by-products will be produced during the reaction? What are their characteristics (flammable, explosive, toxic, etc)?

過程中會產生多大的溫度和壓力?

What is the maximum temperature and pressure produced during the reaction?

你從事的化學反應在什么條件下(什么樣的溫度,壓力,催化劑作用下)會產生失控現象?

Under what conditions (temperature, pressure or catalyst) will the chemical reaction be out of control?

對于具有高度活性的化合物,如乙炔-acetylene,丁二烯-butadiene,二氧雜環乙烷-dioxane,乙烯氧化物-ethylene oxide,氧氣-oxygen和其他一切強氧化劑,操作時必需特別小心。

Special care must be taken to deal with highly active compounds such as acetylene, butadiene, dioxane, ethylene oxide, oxygen and other strong oxidants.

對任何會突然釋放大量熱量的試驗,對會產生爆炸性副產品或終產品的試驗也要特別小心。

Special care must be taken for any test that will suddenly release a large amount of heat and which may produce explosive by-products/final products.

如果你用新的或性能不清楚的材料做試驗,建議你先用少量的試驗劑做初步試驗,以了解其性能和試驗過程中可能產生的問題。

If you use new or unclear materials for the test, it is recommended to conduct the preliminary test with a small amount of reagent to understand their properties and possible problems during the test.

 11.實驗室必需通風良好,反應容器要放在實驗室的排風罩或排風口附近。必要時,尤其是有可燃或有毒氣體產生的可能時,要增加裝置將排出的氣體導室外。必要時要使用 防護墻以保證試驗的安全,此時注意到應該使用鋼筋水泥做防護墻,不能用玻璃或鋼化玻璃做防護墻。

The laboratory must be well ventilated and the reactor shall be placed near the exhaust hood or air outlet. When necessary, especially when it is possible to produce flammable or toxic gas, more ventilation devices shall be provided to remove the gas outside. If necessary, the protective wall shall be used to ensure the safety of the test. Please note that reinforced cement, rather than glass or reinforced glass, shall be used for the protective wall.

 12.試驗室請不要靠近容器的頂部,因為在防爆片破裂時會釋放出大量的過熱蒸汽,易燃或有毒氣體,產生巨大的噪聲,傷害人體和破壞聽覺。如有這種現象產生的可能時,則 要用管子將防爆片的出口連到室外,并采取保護耳膜的措施。

The laboratory shall not be close to the top of the reactor, because a large amount of superheated steam, flammable or toxic gas will be released when the rupture disk bursts, which will also produce huge noise to harm human body and damage hearing. In that case, the outlet of the rupture disk shall be connected to the outdoor or take measures to protect the eardrum.

 13.試驗中如有可能產生易燃,易爆氣體,所有的電器裝備必需采取防爆措施。應將防爆的電器總閘設在室外。

If flammable and explosive gas is produced during the test, explosion-proof measures must be taken for all electrical appliances. The explosion-proof main switch shall be placed outdoors.

 14.一般試驗材料的裝載量不得超過容器體積的三分之二,因為有些介質(譬如水)在高溫下體積會膨脹三倍以上,是壓力突然升高,超過允許的壓力極限。建議盡量用小的裝 載量進行試驗。

Generally, the amount of test materials shall not exceed 2/3 of the reactor volume, because some media (e.g. water) will expand more than three times at high temperature to suddenly raise the pressure and exceed the permitted pressure limit. It is recommended to carry out the test with a small amount.

 15.建議不要使用很高的工作溫度或壓力進行試驗,因為在實驗過程中由于化學反應,容器的溫度和壓力都會進一步升高,大到不能允許的程度。

It is recommended not to use the maximum working temperature/pressure for the test, because the temperature and pressure of the reactor will further increase to an unacceptable level due to chemical reaction.

 16.不要用砂紙打磨、清理容器。這會降低容器的承壓能力。

Do not use sandpaper to polish or clean the reactor as it will reduce the pressure bearing capacity of the reactor.

 17.應該均勻地,逐步地用規定的力矩擰緊容器的密封螺帽,使各個螺栓達到一樣的應力狀態。不要一下子擰緊某些螺帽,然后再擰緊其他螺帽。這樣被先擰緊的螺栓中的應 力會大大高于其他螺栓,是螺紋產生變形。螺帽不要擰得過緊或過松。過松會導致密封壓力不夠,產生漏氣。過緊會使螺栓過載,甚損壞。

It is necessary to tighten the sealing nuts of the reactor evenly and gradually with the specified torque, so that all bolts bear the same stress. Do not tighten some nuts at first and then others. In that case, the stress of the bolts tightened first will be much higher than that of others. It will cause deformation of the thread. Do not over tighten or loosen the nuts. Too loose will lead to insufficient sealing pressure and leakage while over tightening will overload or damage the bolts.

 18.新容器做試驗時可用50%裝載量的蒸餾水,加溫到150,以檢驗容器的密封情況和各控制系統的運行情況。

When new reactor is used, the distilled water (50%) can be heated to 150 to check the sealing of the reactor and the operation of each control system.

 19.實驗前,檢查墊圈的狀態,如損壞,需及時更換;如發現起了毛邊,用小刀輕輕刮去。

Check the washer before the test. Replace in time if it is damaged. If burr occurs, remove it gently with a knife.

 

 

關于我們

公司簡介公司新聞榮譽資質

產品展示

催化反應裝置 微型催化劑評價裝置 高通量催化劑評價裝置 催化劑評價裝置 新材料 加氫反應裝置 固定床反應裝置 微反裝置 多通道反應器 高通量反應器 多通道固定床反應器 釜式反應裝置 固定床反應器 實驗室裝置 實驗室反應釜 可視高壓反應釜 全透明高壓反應釜 藍寶石反應釜 平行高壓反應釜 多功能高壓反應釜 均相反應器 催化劑制備小試裝置 聚酯合成反應裝置 酯化加氫反應裝置 高低溫反應釜 多通道反應釜 多通道固定床 高低溫反應裝置 小型高溫高壓反應釜 微型固定床反應器 單管固定床反應器 光電催化反應裝置 高壓全透明反應釜 三元前驅體裝置 微型管式反應器 二氧化碳超臨界反應釜 中試高壓反應釜 聚合反應裝置 實驗室反應裝置 流動化學 微型高壓反應釜 高溫高壓動態腐蝕系統 釜式聚酯合成反應器 智能釜式酯化合成反應器 二氧化碳超臨界光電反應裝置 H型光電反應釜 智能高壓反應釜 防爆型反應釜 隔爆型反應釜 減壓蒸餾智能反應釜 聚合智能反應釜 光熱催化反應裝置 低壓實驗聚合反應釜 連續聚合反應釜 玻璃反應釜 夾套可視反應釜 光熱固定床連續反應裝置 超聲波反應釜 多功能高壓相平衡實驗裝置 高壓球型反應釜 PET聚酯小試聚合裝置 高分子聚合試驗裝置 聚碳酸酯PC裝置 聚氨酯PUR裝置 催化劑評價回收裝置 乙烯超臨界全透明反應裝置 智能釜式聚酯合成反應器 絕熱反應器裝置 聚碳酸酯多元醇高壓釜裝置 高溫高壓邏輯反應釜 乳化攪拌反應釜 聚醚反應釜 平行高溫高壓反應釜 流動氫化儀 加氫反應儀 高壓氫化儀 氫化儀 中壓加氫儀 光裂解裝置 高壓原位拉曼光譜動態分析系統 高溫高壓原位拉曼反應裝置 高壓光化學反應釜 5L哈氏合金釜 烷氧基化小試裝置 聚酯反應釜 丁二烯釜式反應裝置 聚碳酸酯多元醇高壓釜 高通量釜式反應系統 微型流動合成儀 二氧化碳超臨界電解水煤漿制甲烷裝置 循環氣固定床實驗裝置 玻璃釜式反應系統 三元前驅體控制系統 同位素制備裝置 二氧化碳氣液平衡裝置 濕式氧化小試裝置 0.5L加氫反應裝置 聚合反應實驗裝置 聚酯反應實驗裝置 多功能聚合反應裝置 攝像反應釜 聚合物實驗裝置 球型提純反應裝置 三元鋰電 環保與清潔能源 精細化與醫藥 石油化工 天然氣化工

服務與支持

技術文章資料下載在線留言聯系我們

掃碼關注我們

服務熱線

18701759826

上海金山區亭林鎮松金公路5440號

yly@yanzheng17.com

Copyright © 2025上海巖征實驗儀器有限公司 All Rights Reserved    備案號:滬ICP備11034097號-3

sitemap.xml

刺激战场老阿姨是谁啊| 97久久综合亚洲色HEZYO| 免费无码一区二区三区蜜桃大| CHINESE熟女熟妇2乱| 少妇CHINA中国人妻VIDE| 国产网红无码精品视频| 一边做饭一边躁狂我会怎么样呢 | 偷看自己婆给别人玩经过| 国内精品久久久久影院中文字幕| 一杆长枪直入两扇门| 人妻办公室内上司侵犯| 国产卡一卡二无线乱码| 亚洲中文字幕日产乱码高清APP| 欧美顶级PPT免费模板网站| 国产69精品久久久久久人妻精品 | 国产AV一区二区三区传媒| 亚洲AV无码专区亚洲AV手机版| 裸体欣赏ⅤIDE0SPH0TO| 成人免费一区二区三区视频软件| 亚洲AV喷水无码XXX| 毛片TV网站无套内射TV网站| 成在线人免费无码高潮喷水| 亚洲VA无码手机在线电影| 男人把女人桶到爽免费应用| 国产A级毛多妇女视频| 亚洲欧洲精品无码AV| 拍摄AV现场失控高潮数次| 国产精品久久久久精品综合| 伊人久久大香线蕉AV色| 色婷婷狠狠18禁久久YYY| 精品国偷自产在线视频| japanese国产在线观看| 小妖精好爽H快穿共妻| 免费精东传媒VS天美传媒| 我的好妈妈中文字幕HD| 欧美精品视频一区二区| 久久成人亚洲香蕉草草| 国产精品偷窥老熟女高潮| 亚洲熟妇V一区二区三区色堂| 日本19禁啪啪吃奶大尺度| 久久69精品久久久久久HB| 国产成人精品无码播放| AV无码人妻精品丰满熟妇区| 校园H学长含着粉嫩小奶| 日本老熟妇VIDEO| 免费中文熟妇在线影片密芽| 久久婷婷五月综合色和啪| YY111111少妇影院无码| 成人AV片在线观看免费| 99久久无色码中文字幕人妻蜜柚| 中文字幕丝袜人妻制服丝袜在线 | 国产成人精品A视频一区| AAAA级少妇高潮大片在线观看| 亚洲欧美另类激情综合区蜜芽| 亚洲AV成人午夜福利在线观看| 香蕉久久人人97超碰CAOPR| 他用嘴巴含着我奶头吸怎么办| 免费看又黄又无码的网站| 精品无人区一区二区三区| 国产成人无码精品XXXX| 八戒八戒手机在线高清观看WWW| 中国少妇无码专区| 亚洲无码成人av| 无码人妻AⅤ一区 二区 三区| 天堂在\/线中文在线8| 农村妇女野战BBXXX农村妇女 | 久久久久久久综合综合狠狠| 久久人人爽人人人人片AV| 黑人精品一区二区| 国产VOYEUR精品偷窥222| 99国产精品欧美一区二区三区| 亚洲最大成人综合网720P| 亚洲精品无码AV中文字幕| 亚洲AV无码一区二区三区18| 无码口爆内射颜射后入| 熟女少妇丰满一区二区| 精品国产乱码久久久久久软件大全 | 亚洲精品TY久久久久久久久久| 欧美人与动人物XXXX9296| 好硬好湿好爽再深一点动态图片| ZOOM人与ZOOM| 亚洲一区波多野结衣在线APP| 台湾MD豆传媒一区二区| 哦┅┅快┅┅用力啊┅┅电影 | 从你的全世界路过| 幼儿HIPHOP张婉莹仙踪网| 午夜福利AV无码一区二区| 青青草国产成人A∨| 久久久久高潮毛片免费全部播放| 国产高潮流白浆喷水在线观看| 97成人无码免费一区二区中文| 亚洲国产五月综合网| 少妇人妻AV无码专区| 内射人妻视频国内| 久久777国产线看观看精品 | GOGO高清大胆全人艺术| 亚洲综合日韩久久成人AV| 小12箩利洗澡无码视频网站| 日本午夜精品一区二区三区电影 | 幻女FREE性俄罗斯毛片| 公交车里抓着摇曳的手环诗情| 99精品视频在线观看婷婷 | 无码日韩精品一区二区人妻 | 男生白内裤自慰GV白袜男同| 精品一区二区三区在线观看| 国产精品欧美久久久久无广告| WWW.射射爽射射爽射射爽| 永久939W79W99W乳液| 亚洲第一天堂成人网站| 脱岳裙子从后面挺进去| 人性禁岛1破禁果| 免费久久99精品国产自在现| 精品人妻大屁股白浆无码| 国产精品嫩草影院一二三区入口| 草莓丝瓜向日葵黄瓜榴莲IOS| 祖母和おばあちゃん的区别| 亚洲色欲啪啪久久WWW综合网 | 三个人一起玩3Q详细经过| 欧美日韩一区二区综合| 裸体美女扒开下部无遮挡网站免费| 狠狠综合久久综合88亚洲| 国产精品丝袜高跟鞋| 嗯~使劲~别停~高H漫画| 啊轻点灬大JI巴太粗太长在线了| 中文字幕丰满乱子无码视频 | 五十路熟妇亲子交尾| 色综合色欲色综合色综合色综合 | 中文字幕大香视频蕉免费| 亚洲日韩中文第一精品| 亚洲AV无码专区在线观看成人 | 出差被绝伦上司侵犯中文字幕| 99精品久久久久中文字幕| 在厨房拨开内裤进入毛片| 亚洲色丰满少妇高潮| 亚洲—本道 在线无码AV发| 掀开老师的裙子挺进去| 婷婷久久综合九色综合97| 色欲A∨无码蜜臀AV免费播| 人人澡人人妻人人爽少妇| 欧美激情视频一区二区三区免费| 美丽人妻在夫前被黑人| 久久久久亚洲AV无码六十路老熟| 精品爆乳一区二区三区无码AV| 国产未成女一区二区| 国产精品JIZZ在线观看老狼| 高黄暴H日本在线观看| 成码无人AV片在线电影网站| らだ天堂√在线WWW| AV片在线观看网站免费| 主人给我戴上奶牛榨乳器调教| 伊人久久大香线蕉综合影院 | 小蜜桃HD中字高清在线| 午夜无码人妻AⅤ大片色欲李宗瑞| 挺进绝色老师的紧窄小肉六视频 | 欧美疯狂做受XXXX高潮| 女人被狂躁到高潮视频免费软件| 乱人伦人妻中文字幕在线入口| 久久水蜜桃网国产欧美H版护士| 九热爱视频精品视频| 精品久久久久久久免费人妻| 精精国产XXXX视频在线播放| 和岳每晚弄的高潮嗷嗷叫视频| 黑人女性猛交XXXXXⅩXX蘑 | 国产69精品久久久久9999不| 丰满人妻被粗大爽ⅩXOO | 97人伦影院A级毛片| 99精品电影一区二区免费看| 69日本人XXXX16-18| 377人体粉嫩噜噜噜| 98久9在线 | 免费| H纯肉无码精品动漫在线观看| WWW亚洲精品自慰一区二区三| WYC忘忧草在线看WWW| 别揉我奶头~嗯~啊~视频| 成人国产精品一区二区免费| 大码HIPHOP欧美胖MM短袖| 村长趴在小雪身上耕耘视频| 丰满人妻无奈张开双腿AV| 公玩弄年轻人妻HD| 国产精品久久无码不卡黑寡妇| 国产欧美日韩专区发布| 国内精自线一二三四2021| 精品国产AⅤ一区天美传媒| 久久国产情侣露脸精品| 久久人人爽人人爽人人AV东京热| 老根嫩草1一40淑媛全文| 奶头被几个流浪汉吃肿了| 欧美性猛交XXXX黑人口味重| 人妻无码久久一区二区三区免费| 日韩欧美AⅤ综合网站发布| 少妇亚洲XXXX| 香蕉直播永久免费版APP| 亚洲VA久久久噜噜噜久久天堂 | 西西444WWW大胆无码视频| 亚洲AV中文AⅤ无码AV接吻| 亚洲欧美日韩国产成人| 与亲女洗澡时伦了毛片| 99国精产品灬源码168| 办公室被公司领导C了很多次| 粗大猛烈进出高潮视频免费看|