Qhov muaj pes tsawg leeg thiab cov kev siv cov yam ntxwv ntawm cov iav fwj
Firstly, nws yog qhov tsim nyog tsim qauv, txiav txim siab, thiab tsim cov pwm. Cov khoom siv raw yog tsuas yog quartz xuab zeb, thiab lwm cov ntaub ntawv ib pab pawg tau yaj mus rau hauv lub xeev ua kua thaum kub. Tom qab ntawd, nws tau txhaj rau pwm, txias, txiav, thiab tempered los ua lub khob iav. Moulding o ...
Mus nyeem ntawv