受力零件 meaning in Chinese

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Product description : this series product has entire auto - lubrication systems and the ordinary two big kinds supplies to select , this machine major parts cancels the needle , cam and the ball bearing all uses the high quality import components , also selects the high quality steel products quenching heat treatment to the main stress components , the essential components uses special phosphorus processing , the foreign dew components all adopts special - purpose seal - up device and drains the oil the measure , therefore , entire causes machine throughout to locate the lubrication is reliable , the revolution is steady , under the high speed low chirp condition works
本系列产品具有全自动润滑型及普通型两大类以供选用，本机主要零件勾针，凸轮及滚珠均采用优质进口零件，对主要受力零件亦选用优质钢材淬火热处理，关键零件则采用专门磷化处理，对外露零件均采取专用密封装置及排油措施，因此，使整机始终处于润滑可靠，运转平稳，高速低噪的条件下工作。