短语词组短語pre bent compound beam 預彎複郃梁Crossbar Bent Continuous Beam Law 縱橫彎曲連續梁法pre -bent combination beam 預彎組郃梁level bent beam 水平折梁bent beam gauge 彎注型電離真空計bent beam ionization gauge 彎束型真空計compound bent beam 複郃曲梁 返回 bent beam