Kev ceev faj rau kev teeb tsa ntawm qhov siab kub hose pob qij txha

(1) Thaum cov yas hloov mus los yog nyob ruaj ruaj, nws yuav tsum tsis yog khoov dhau, thiab yuav tsum tsis yog khoov ntawm lub hauv paus, tab sis yuav tsum tau khoov duav tsawg kawg 1.5 npaug ntawm nws txoj kab uas hla;

(2) Thaum cov yas txav mus rau qhov chaw siab, nws yuav tsum tsis txhob rub nrawm heev thiab yuav tsum xoob;

(3) Ua kom tsis txhob muaj kev cuam tshuam ntawm torsional ntawm lub hose;

(4) Cov nqaj hlau tau tso cai kom deb ntawm cov hluav taws xob tiv thaiv, thiab nws yog qhov tsim nyog los nruab cov ntaub thaiv cua kub;

(5) Txav deb ntawm kev puas tsuaj rau sab nraud rau ntawm qhov sib tsoo, xws li kev sib txhuam ntawm lub sijhawm ntev nyob rau saum npoo ntawm cov khoom sib txuam thaum siv;

(6) Yog tias siv dej hose' s tus kheej qhov hnyav ua rau ntau yam deformation, yuav tsum muaj kev txhawb nqa ntu.