天堂在线免费视频,美女自慰网站无档,水蜜桃精品av一区二区,九九人妻无码一区

煤礦用阻燃通信電纜(原煤礦用信號電纜)5＊2＊0.7

fire-retardant communication cables for coal mines(signal electric cable)


煤礦用阻燃通信電纜(原煤礦用信號電纜)520.7產品用途:產品適用于煤礦井下監(jiān)測、控制系統(tǒng)作低頻信號傳輸線。

scope of application:the product is suitable for the coal mine mine shaft monitor, the control system makes the low-frequency signal transmission line

執(zhí)行標準 standards implemented: q/3210hl07-2005

型號名稱及使用范圍 model desc-riptions and use scope 型 號