1. Khoom nta
Muab kauv kauv ntsej muag muaj cov yam ntxwv li nram no:
(1) Nruam moulding, qhov tseeb raug;
(2) Nto du thiab zoo ntsug;
(3) Qhov tseeb ntawm qhov ntev yog qhov siab, qhov saum npoo ntawm qhov nyuaj yog qhov zoo, thiab qhov ua haujlwm tsis kam.
(4) Cov xov Rigid, yooj yim sib sau ua ke.
2. Khoom thov
Muab kauv hniav tawg feem ntau siv nyob rau hauv txoj cai kauv thiab sab laug kauv, uas tau txiav txim siab los ntawm yuav ua li cas muab kauv hniav tsim. Yog hais tias muab kauv hniav tawg yog nyob ntawm sab tes xis ntawm ntug qhov chaw muab kauv hniav, nws yog txoj cai kauv; yog nws nyob sab tes laug, nws yog tus kauv laug.
Standard pitch tib lub taub hau Helix-lub suab ntawm cov kauv qhov helical hniav yog sib npaug ntawm txoj kab uas hla ntawm tus kauv, uas yog hu ua txheem suab. Tus kauv no muaj ntau yam yoog raws cov khoom siv tau.
Cim npe nrov: helical ntsia hlau hniav, Tuam Tshoj, cov chaw muag khoom, chaw tsim khoom, Hoobkas, kev cai, nqe, OEM, kev muag, hauv Tshuag
