最早使用具有半圆形排线架的交换机和具有垂直和旋转运动方向的轴。
Earliest use of switch with semi-cylindrical bank and shaft with vertical and rotary motions.
放线架、各段绞笼体、线模座、计米装置、双轮牵引装置、收排线架、传动系统和电控系统。
Pay-off strand, stranding cartage, compact die stand, counter meter, double draught wheels, take up and traverse device, mechanical transmission system and electrical control system.
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