1. Daim ntawv thov ntawm calipers Lub caliper tuaj yeem ntsuas cov kab hauv qab, sab hauv txoj kab uas hla, ntev, dav, tuab, kauj ruam sib txawv, qhov siab thiab qhov tob ntawm cov khoom; lub caliper yog qhov feem ntau siv thiab ntsuas qhov yooj yim tshaj plaws, thiab feem ntau siv ntsuas ntsuas ntawm kev ua ...
Nyeem ntxiv