短语词组短语pre bent compound beam 预弯复合梁Crossbar Bent Continuous Beam Law 纵横弯曲连续梁法pre -bent combination beam 预弯组合梁level bent beam 水平折梁bent beam gauge 弯注型电离真空计bent beam ionization gauge 弯束型真空计compound bent beam 复合曲梁 返回 bent beam