column jib cranerotary tower cranetower slewing crane塔式: tower-type; step grate旋: whirl臂: arm起重机: crane; derrick; crab; freigh ...立柱式旋臂起重机: pillarrotary,revolvingcrane; revolving crane; revolving pillar jib crane; rotary crane下载手机词典可随时随地查词查翻译