Thursday, September 15, 2022
Tuesday, March 19, 2024
当发现电线坠地或设备漏电时,切不可随意跑动和触摸金属物体,并保持lOm以上距离。...
Wednesday, September 27, 2023
Thursday, September 15, 2022
双排脚手架里排立杆低于檐口()cm。A、20-30B、40-50C、60-70...
Tuesday, January 10, 2023
Thursday, September 15, 2022
搭设双排杉槁脚手架时,如遇地面较硬,立杆无法埋深时,可以直接立在...
Thursday, September 15, 2022
Thursday, September 15, 2022
Thursday, September 15, 2022
Thursday, September 15, 2022
Thursday, September 15, 2022
“两级保护”主要指采用漏电保护措施,除在末级开关箱内加装漏电保护...
Thursday, September 15, 2022
剪刀撑斜杆用旋转扣件固定在与其相交的横向水平杆伸出端或立杆上,旋...
Thursday, September 15, 2022
在常见的安全色中,绿色的含义是()。A、通行B、中断C、解禁D、堵塞...
Thursday, April 6, 2023
Saturday, February 17, 2024
窄挑梁最大允许均布总荷载为()kNA、2.5B、2C、1.5...
Saturday, February 17, 2024
纵向水平杆如搭接时,搭接长度不应小于lm,应等间距设置()个旋转扣件固定。A、3B、2C、1...
Monday, October 17, 2022
Thursday, September 15, 2022
一般相线(火线)分为A,B,C三相,分别为黄色、绿色、红色。工作...
Sunday, September 11, 2022
当脚手架拆至下部最后1根长立杆的高度时,应先在适当位置搭设临时抛...
Sunday, September 11, 2022