双层拉线鼓轮 double-deck drawing block
双层绝缘的 double-insulated
双层的 double-layer
双层一次挤出(法) double-layer coating co-extrusion
双层挤出(机)头 double-layer extrusion head
双层纸 double-ply paper
双丝包的、双层丝绝缘 double-silk covered
双层挤出(机)头 dual (extruder) head
泡沫/实心双层绝缘、泡沫绝缘 dual expanded plastic insulation
双层挤出机 dual extruder
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