双层绝缘导线 double insulated condutor
双层直角挤出机头 double layer crosshead
双层钢带铠装 double layer of steel-tape armour
双层钢带铠装 d.s.t.a.(double layer of steel-tape armour)
双层护套电缆的内护套直径 DOIJ
单层纸 simplex paper
单层滚筒七头拉线机 single deck 7 heads type machine
单层环氧漆包圆铜电磁线 single epoxy-coated round copper magnet wire
单层金属编织机 single tier type wire braiding machine
单层的 single-layer
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