... 理论空气量 air, theoretical 空气乙炔熔接 air-acetylene welding 气动运送机 air-acitvated conveyer ...
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air acetylene gas welding
... acetylene-welding installation 乙炔氧焊装置 ; 乙炔氧焊安装 air acetylene gas welding 空气乙炔熔接 acetylene gas welding 乙炔气焊 ...
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