1. Kev kuaj pom ntawm lub nruas nres nres khau:
(1) Txawm hais tias cov khau nres yog puas, tawg, deformed, thiab lwm yam.
(2) Txawm hais tias nws yog stained los ntawm cov dej nres lossis roj, yog tias muaj, nws yuav tsum tau hloov nrog ib qho tshiab.
2. Thickness ntawm nruas nres nres khau kev sib txhuam pads:
(1) Ntsuas lub thickness ntawm lub brake khau txhuam, tus qauv tus nqi yog 5 hli, thiab kev siv txwv yog 2.5 hli.
(2) Qhov kev ncua deb ntawm lub rivet thiab qhov chaw ntawm qhov sib txhuam phaj yuav tsum tsis pub tsawg tshaj 1 hli.
(3) Thaum lub log tsis raug tshem tawm, lub thickness ntawm tus nres khau kev sib txhuam ncoo tuaj yeem ntsuas qhov pom ntawm qhov kev soj ntsuam ntawm lub phaj phaj.
3. Txheeb xyuas qhov chaw sib cuag ntawm lub nruas nres nruas ko taw: tom qab qhov chaw ntawm lub nruas nres nres nres yog polished huv si, lean ntawm lub nruas nres nres, thiab xyuas qhov chaw sib cuag ntawm ob, uas yuav tsum tsis pub tsawg tshaj 60. feem pua , txwv tsis pub lub npoo ntawm kev sib txhuam hauv ob sab phlu yuav tsum tau polished txuas ntxiv.
