Muaj ntau ntau yam ntawm cov thoob khib nyiab, Piv txwv li, cov thoob khib nyiab siv rau hauv kev huv thiab huv huv, loj loj, 240L cov thoob khib nyiab tau muaj zog tig ntug thiab lub thoob npog kho qhov, Cov khib nyiab tuaj yeem yas yog qhov kawg npog, Nrog Cov phab ntsa nyias nyias, yooj yim rub lub deformation, yooj yim sab saum toj deformation, feem ntau yog siv cov yas pwm kev txhaj tshuaj molding molding, Tab sis cov khib nyiab tuaj yeem feem ntau vim tias tom qab tsim, txias shrinkage, Ctightly nyob ib ncig ntawm cov tub ntxhais, Nyob rau hauv cov txheej txheem ntawm molding, Vim lub Lub zog loj ntawm cov phab ntsa sab nraud, Ua kom muaj kev sib txhuam loj ntawm cov khoom thiab qhov chaw ntawm cov tub ntxhais muaj nyob, Thaum tus pas nrig sab saum toj raug thawb tawm ntawm cov khoom, Nws yog qhov nyuaj rau tawm, Thimble dabtsi yog khoov, Thimble tops cov khoom tawm ntawm lub white dot defect nqis mus rau sab saum toj ntawm cov khoom.