久久夜色精品国产尤物,女的张开腿让男的捅的视频,亚洲国产中文一区二区三区中文字幕

91啦丨九色丨蚪窝人妻,国产三级无码在线观看,欧美黑人XXXX高潮猛交,少妇人妻好深好紧精品无码

Testing for High-voltage alternating current disconnection circuit-breakers1
SETC could provide routine tests, special tests and type tests for high-voltage apparatus , transformers, EMC, environmental test,direct line supply, charging piles. Our customers group covers most part of China. We are the top testing service supplier of the most influential leaders in high-voltages electrical apparatus manufacturers.

SETC is accredited by national and provincial CMA and authorized CNAS testing and inspecting institution. We are the member of CHPTL. We are the cooperated testing laboratory of State Grid, the switchgears quality testing laboratory approved by SINOPEC.

Member of High-voltage Switchgear Standardization Technical Committee of China

Member of High-voltage Switchgear IEC expert working group of china 

Member of High-voltage Switchgear and Direct-current Power Standardization Technical Committee of China Electric Power Industry

Member of Energy Industry Short-circuit Test Standardization Technical Committee of National Energy Administration

Vice chairman and expert committee member of intelligent power transmission & Distribution Industry Alliance

SETC is accredited by national and provincial CMA and authorized CNAS testing and inspecting institution. We are the member of CHPTL. We own many top industrial experts and intellectuals in China. With the establishment of intellectual ladder, the staff who have bachelor degree or above(master degree, doctor degree) occupies 81.25% of total member.

SETC has always been active in drafting and revising GB, DL , NB standards and standards for material procurement department of National State Grid, and invited to participate in the technology proposal verification meetings, the meetings of accidents analysis, the inspection of factories, the discussion meetings for construction of factories and professional training for constructors and workers.

Contact Us
Shanghai Electric Power Transmission & Distribution Testing Centre Co.,Ltd.
Address:No.696 Lingshi Road, Jing'an, Shanghai,PRC
Post code:200072
Tel: 86-21-56657002
Fax:86-21-56037283
e-mail:lixf8@shanghai-electric.com
国产亚洲精品AA片在线观看动图| 熟妇伦精品一区二区三区午午影视| 国产精品无码一区二区老黄瓜| 国内精品国产三级国产AV| 日韩精品三| 精品人妻互换一区二区被强行 | 日本在线免费| 精品人妻无码一区二区蜜桃99| 欧美熟女一区| 亚洲AAAAAAA| 日韩精品免费在线| 丝袜人妻中文字幕| 日韩AAAAA玩弄极品人妻少妇| 免费A级人成a大片在线观看| 国产精品国产| 国产一级a毛一级a免费看视频 | 五十路熟女俱乐部| 久久久久国产电影观看| 亚洲日本国产| 97国产无码| 亚洲精一区二区三区| 天堂婷婷| 三级欧美片| 亚洲欧洲精品在线观看| 中国熟妇内谢69xxxxx| 国产午夜精品久久久久免费视高清 | 色哟哟国产最新| 99热免费观看| 亚洲欧洲国产视频| 国产精品一级AV片免费看| 免费毛片观看| 一本无码不卡| 无码人妻一区二区三区免费视频| 久久久精品亚洲| 色一情一区二| 91av视频在线观看| 超碰熟女| 内射人妻无码色蜜桃| AV无码免费一区二区三区| 老汉AV免费一区二区三区| 欧美亚洲另类久久综合二区 |