欧美日本韩国在线丨国产日韩亚洲大尺度高清丨久草日韩丨亚洲综合第一页丨国产中文区二幕区2021丨国产最爽乱淫视频免费丨欧美国产国产综合视频丨亚洲日本国产综合高清丨久久天天躁狠狠躁夜夜2o2o丨男女一边摸一边做爽爽丨琪琪午夜伦理丨无码熟熟妇丰满人妻啪啪软件丨国产xxxx做受视频丨色婷婷激情综合丨高清无码一区二区在线观看吞精丨精品亚洲成a人在线观看青青丨精品日产高清卡4卡5区别丨国产午夜羞羞小视频在线观看免费丨男人到天堂在线a无码丨美女131爽爽爽丨欧美成人不卡丨九一午夜精品av丨中国黄色网址丨亚洲欧美www丨国产艳妇av视国产精选av一区

　　Product type: cement test pile

　　Product details:

　　Cement test pile is mainly customized according to customer needs, generally suitable for easy theft places, because in some areas of the steel pipe test pile often stolen, and the cement

　　test pile because of its own use value is not high, so it is generally not easy to be damaged.

　　According to the needs of the market, our company independently developed and produced the second generation of rainproof test pile, inherited the previous generation of excellent

　　design concept, the door shaft is made of stainless steel. Test pile detection mouth with rain eaves, prevent rain intrusion; The test pile test door is provided with a special open key,

　　Prevent abnormal opening. At the same time, it also has the advantages of anti-theft, strong, durable and beautiful. It is suitable for cathodic protection of buried metal pipelines in

　　different industries such as natural gas, liquefied petroleum gas, petroleum, refined oil, artificial gas, chemical industry, water conservancy and tap water.

　　It is also applicable to cathodic protection of underground structures in cities (such as buried metal pipe network, oil field pipe network and long distance buried metal pipeline).

　　Can be customized according to customer requirements of special specifications of the test pile.