装卸质量合格率 local loading and unloading rate: 管内装卸率rate of loading and unloading: 装卸率loading and unloading: 搬运装卸; 装卸工作; 装载rate of unloading: 减负荷速度unloading rate: 卸货速率下载手机词典可随时随地查词查翻译