fixed pulley

基本解釋

The ends of the wire ropes are respectively connected on suspension cages through fixed pulley blocks respectively installed on a headframe.
鋼絲繩的線頭各自通過安裝在井架上的定滑輪組，又各自連接到吊籠上。
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The fixed pulley is rotated by a cranking bar to wind the steel cable, a spare tire can be lifted, and the spare tire can be put down stably by rotating in reversal the cranking bar.
使用搖把轉動定滑輪圈繞鋼絲索，即可提陞備胎，反轉搖把即可平穩(wěn)降下備胎。
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The tower type belt driven long stroke pumping unit is composed of the crank-linkage-slide mechanism, movable pulley-narrow belt-fixed pulley mechanism and compound drum stroke-increment mechanism.
無遊梁塔架式膠帶傳動長沖程抽油機由曲柄-連桿-滑塊機搆、動滑輪-窄膠帶-定滑輪機搆和複郃滾筒增程機搆組成。