Rigid metal conduit - aluminium , bronze and stainless steel 硬金属导管.铝青铜和不锈钢
Boxes and box covers for rigid metal conduits 钢性金属接线盒和盒盖
Fittings for rigid metal conduits erratum 1 刚性金属导管的接头
Electrical rigid metal conduit - steel 硬金属电导管.钢
Electrical rigid metal conduit - aluminum , bronze and stainless steel 电器用刚性金属导管.铝青铜及不锈钢
Fittings for rigid metal conduits 刚性金属导管配件
Boxes for rigid metal conduits 硬金属导管用连接盒
Rigid metal conduit - steel 硬质金属导管.钢
A ballast intended to be supported only by rigid metal conduit , a fixture stud , or similar devices shall comply with the requirements in section 18 , pullout , bending , and twisting tests 整流器只能由刚性金属导管支撑,装配螺栓或相似的部件必须符合18条,通过拉力、弯曲和扭转测试。