单词	cleat in coal
释义	cleat in coal 煤裂隙
随便看	hardening flaw hardening function hardening furnacc hardening furnace hardening gradient hardening heat hardening heat treatment hardening in boiling water hardening index hardening in ice hardening in lead bath hardening in situ hardening kiln hardening laws hardening layer hardening layer metal quenching hardening lens hardening liquid hardening machine hardening machine for disc category hardening material Hardening means make harder Hardening means making harder hardening mechanism hardening media