Cov khoom tseem ceeb ntawm cov khoom siv pob tawb yog cov khoom siv PE, los ntawm kev txhaj tshuaj molding txheej txheem kev sib xyaw cov khoom yas, lub zuag qhia tag nrho ruaj khov, muaj zog tenacity, pov tsis yooj yim rau kev puas tsuaj, yog dav siv, feem ntau nyob rau hauv tag nrho cov kev mus los ntawm lub neej turnover, ntim. kev tiv thaiv kev puas tsuaj, khaws cia thiab khaws cia, kev faib cov kab ntau lawm thiab lwm yam.Yas turnover box series pwm (xws li yas npias thawv pwm, yas dej tank pwm, yas txiv hmab txiv ntoo lub thawv pwm, ntim lub thawv pwm, xov lub thawv pwm, yas thawv pwm, kaw lub thawv pwm, hnab looj tes pwm, cia thawv pwm, thiab lwm yam) feem ntau siv pwm steel: 45 #, 40 Cr, P20,2738,2316,718, NAK 80, S136 thiab lwm yam.