The drill string is rotated by rotary table.
钻柱是由转盘驱动的。
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.
使用摇把转动定滑轮圈绕钢丝索，即可提升备胎，反转摇把即可平稳降下备胎。
As one of the individual variable vanes is rotated by an actuation source, the other variable vanes of the variable vane array are rotated a like amount by the rack and pinion gear interface.
当其中一个可变叶片由一驱动源转动时，可变叶片阵列上的其他可变叶片通过齿条和小齿轮的相互作用而转动一个相同的量。
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