A.1/4,1.5mm,2mm,3mmB.1/3,1.5mm,2mm,3mmC.1/4,1mm,2mm,3mmD.1/4,1.5mm,3mm,2mm
A.裂紋,2-6mmB.裂紋,6-8mmC.松動,2-6mmD.松動,6-8mm
A.破損,裂紋B.折斷,裂紋C.漏泄,彎曲變形D.漏泄,折斷