词汇	lettersheet
释义	lettersheet 英'letəʃiːt美'letəʃiːtn.信纸邮简
随便看	roller-bearing gate roller bearing grease roller bearing key roller bearing lock ring roller bearing lubrication roller bearing, multiple-row roller bearing needle roller bearing oils roller bearing pillow block roller bearing race Roller bearing race grinding machines roller bearing ring roller bearingrolling bearing roller bearing rope hoist roller bearings roller bearings for goods train roller bearing shop roller bearing sleeve roller bearing steel roller bearing stretcher roller bearing test stand roller bearing water barrage roller bearing wire roller bearing with loose spacing bodies roller bearing with wound rollers