短語詞組短語crack k formation 形成裂縫crack formation criteria 裂紋形成準(zhǔn)則cause of crack formation 裂縫產(chǎn)生原因crack formation and development 裂縫出現(xiàn)與發(fā)展crack formation and propagation 裂紋形成與擴(kuò)展crack formation energy 裂紋形成功crack formation and coalescence 裂縫群開展與貫通mechanism of crack formation 裂紋機(jī)理cause for crack formation 裂縫成因 返回 crack formation