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Cov pwm no belongs rau ob lub sij hawm molding txheej txheem thiab yuav tsum tau siv ua ke nrog ib tug pre-tsim pwm.

Cov yam ntxwv ntawm cov pwm no yog:

(1) 300 t peb-txheej lossis tsib-txheej xovxwm

(2) Ntxiv preformed blocks

(3) Ntau cov pwm tuaj yeem rov ua dua tshiab, thiab kev ua haujlwm ntau lawm yog siab

(4) Cov khoom lag luam zoo tau txhim kho zoo heev piv nrog lub tiaj tus tuag Lub ntsiab ntawm cov pwm yog raws li hauv qab no: