40 Chain Guide Hnav sawb

Lus piav qhia luv luv:

1. Nrog nws tus kheej-lubricating kev ua tau zoo, thaum lub conveying kab yog qhuav, nws ua rau high-ceev conveying tau
2. Nws muaj kev sib txhuam coefficient tsawg heev
3. Txo qhov nro ntawm cov saw hlau
4. Khaws koj lub suab nrov
5. Ua kom lub neej ntev ntawm cov saw hlau, thiab yuav tsis ua kom puas thiab khawb rau cov saw hlau
6. Txo kev siv hluav taws xob