发布时间:2025-01-23 06:05:02
在建筑物电井内垂直布置一条40*4的镀锌扁钢,下端与基础接地网焊接连接,每一层再用40*4扁钢距地面0.3米沿墙面布置一圈,然后与垂直扁钢焊接,过电井门处可以沿底板过度。
电井内设计的扁铁接地一般是竖向明敷设,然后每层在地面抹灰下环绕一圈,与竖向的焊接或者卡接。并在每层距地300出焊出一根扁铁接入leb箱。焊接处做防腐处理。
冰箱里的氟泄漏,冰冻箱里的菜煮沸时有氟的味道,请问吃了有毒�
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2025-01-23 06:05:02 2025-01-23 06:05:02 2025-01-23 06:05:02 2025-01-23 06:05:02 2025-01-23 06:05:02 2025-01-23 06:05:02 2025-01-23 06:05:02 2025-01-23 06:05:02 2025-01-23 06:05:02 2025-01-23 06:05:02 2025-01-23 06:05:02 2025-01-23 06:05:02 2025-01-23 06:05:02 2025-01-23 06:05:02 2025-01-23 06:05:02 2025-01-23 06:05:02 2025-01-23 06:05:02 2025-01-23 06:05:02 2025-01-23 06:05:02 2025-01-23 06:05:02 2025-01-23 06:05:02 2025-01-23 06:05:02