⑴. Qhov tshwm sim ntawm lub kaus mom lub raj mis: puv molding, ua tiav cov qauv, tsis muaj qhov pom tseeb shrinkage, npuas, burrs, tsis xws luag, xim tsis sib xws, thiab tsis muaj kev puas tsuaj rau lub nplhaib tiv thaiv tub sab txuas. Lub puab tsaig yuav tsum tiaj tus, tsis muaj eccentricity, puas, impurities, overflow thiab warping; ⑵. Qhib torque: th...
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