短語詞組短語Bottom Plate Cleaning 底板清洗bottom surface cleaning technology 下表面清理技術(shù)tunnel bottom cleaning 臥底;巷道臥底bottom -hole cleaning 井底清洗;凈化井底bottom cleaning plug 底部清除塞bottom cleaning machine 臥底機(jī)reservoir bottom cleaning 庫底清理cleaning bottom of hole 掃孔CLEANING BOTTOM BIT 清底刀 返回 bottom cleaning