... 槽形支承辊 {机} troughing idler; 槽形支架 troffer; 槽形柱 channel column; ...
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各支架上设有多个接合槽孔及贯穿孔，T形支架与短t形固定片的腹腔板设有扣钩相扣合。
The supports have slotted notches and through holes. The webs of T-shaped support and short T-shaped fixing piece have cramp hooks.
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