在履带式移料装置与定位送料冲压装置之间的机 座平台上设穿线及退架装置。
A threading and a frame withdrawing devices are arranged on the frame platform between the crawler type material shifting device and the position feeding stamping device;
我们通过一架望远镜观察了停留在岩架上的一只海鹦：它在张望，思索，忽进忽退。
Through a telescope we watched the unfolding drama of a puffin on a ledge, peering over the edge, thinking better of it, retreating, advancing, retreating.
该区只包括一个筒子架，卷装在筒子架子上处于有利于退绕的最佳位置。
This zone merely consists of a creel, which holds the old package in an optimum position for unwinding.
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