jacketed wall 中文意思是什麼
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75. 7 757 l specification for kettles, steam jacketed, 20 oz to 200 gal 75. 7 to 757 l, floor or wall mounted, direct connected, gas fired and electric fired
地板和墻上直接安裝的氣體點火和電子點火的20 oz到200 gal
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