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movable block

el. 移动滑轮
fig.skat. 可移动块体; 可移动标志物
hydroel.st. 动滑轮组
met. 移动式卷筒
railw. 移动闭塞
speed.skat. 可移动标物体
tech. 移动滑车; 活动滑车; 动滑轮; 动滑车
movable block
: 2 phrases in 1 subject
Technology2

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