FB 2.20提供安装工人和在选择和应用普通电缆和可伸缩导管配件方面拥有全面指导经验的法典执行官员。
FB 2.20 provides installers and code enforcement officials with comprehensive guidance on the proper selection and application of the most common cable and flexible conduit fittings.
电工梯、电缆托架、电线牵引棒、电线分拨杆、开关插销、伸缩杆等电工电器用品；
Electrician ladder, cable bracket, wire traction stick, switch bolt, flex pole and other electric products;
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