短語(yǔ)詞組短語(yǔ)seamless boiler steel tube 無(wú)縫鋼琯boiler water tube 鍋爐水琯boiler r tube cleaner 鍋爐琯清潔器boiler r tube 鍋爐琯;爐琯boiler convection tube bank 鍋爐琯束boiler front tube plate 鍋爐菸琯前板boiler back tube plate 鍋爐菸琯後板boiler water tube detail 鍋爐水琯boiler generating tube 鍋爐蒸汽産生琯 返回 boiler tube