Txoj moo

Cov saw kis tau muaj cov yam ntxwv tseem ceeb hauv qab no:

1. Txawm hais tias sab hauv / sab hauv cov phiaj yog deformed, tawg, lossis corroded.

Hauv cov cuab yeej kis tau ntawm cov cuab yeej siv tau, feem ntau siv cov khoom siv sib kis xws li punleys, zog, cab los thiab ntsia hlau ceev {}}