They are suitable for the piston bars of sludge pumps, nozzles for sludge and spare parts for machines in mining and geological prospecting.是什么意思_They are suitable for the piston bars of sludge pumps, nozzles for sludge and spare parts for machines in mining and geological prospecting.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句