求翻译：夹具是在切削加工中，用以准确地确定工件位置，并将其牢固地夹紧的工艺装备。它的主要作用是:可靠的保证工件的加工精度，提高加工效率，减轻劳动强度，缩短产品生产周期，充分发挥和扩大机床的工艺性能对保证产品质量。因此，夹具在机械制造中占有重要的地位。是什么意思？

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The jig is in the machining, with by accurately the definite work piece position, and the craft equipment which its clamps reliably.Its main function is: The reliable guarantee work piece processing precision, enhances the processing efficiency, reduces the labor intensity, reduces the product produ

In the fixture was in the cutting, to accurately determine the location work, and firmly clamping technology and equipment. Its main role is to: guarantee of reliable precision workpiece machining, improve processing efficiency, reduce labor intensity, shorten the production cycle, and expanding the

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