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  5. 執(zhí)行器的拉伸負(fù)載與與壓縮負(fù)載有什么區(qū)別？

執(zhí)行器的拉伸負(fù)載與與壓縮負(fù)載有什么區(qū)別？

拉伸力試圖伸展或者延伸執(zhí)行器，而壓縮力將伸縮管推回到執(zhí)行器中

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