Qhov kev faib tawm ntawm cov pwm yog txawv raws li cov khoom siv.
Kho vajtse pwm, yas pwm, thiab nws cov pwm tshwj xeeb.
Cov ntaub ntawv kho mob yuav muab faib rau: xws li kev tuag ploj, pwm pwm, sib sib zog nqus cov pwm, ob lub qhov pwm, pliav pwm, poom thiab qis, txhuam pwm, yas pwm, etc.), forging tuag (xws li stamping tuag, ua kom tsaug zog tuag, thiab lwm yam), extrusion pwm, txhaj mould, tuag casting tuag, forging tuag, thiab lwm yam.
Non-hlau puab yog muab faib rau: pwm yas thiab pwm tsis muaj hlau pwm. Raws li cov ntaub ntawv sib txawv ntawm cov pwm, cov pwm tuaj yeem faib ua: pwm, hlau pwm, nqus pwm, paraffin tuaj pliav thiab nyob rau ntawm lawv. nrog rau txoj kev loj hlob sai ntawm polymer plastics, pwm yas yog zoo tib yam rau tib neeg lub neej.Plastic pwm tau muab faib ua: molding tuag, extrusion molding pwm, roj pab ntiav mould pwm thiab li ntawd.