中華铁工厂是一个專業制造造紙机的工厂。造紙机中有許多作为傳導、榨压,烘干等用的輥筒,这些輥筒一般是中間一个壳狀体,兩端鑲上軸头。它們大概可分为三类:第一类系傳導用的輥筒,大都用無縫鋼管或銅管制成,直徑较小(100～250公厘),重量較輕,如[图-a]。 China Iron Works is a factory that specializes in making paper machines. There are many rollers in the paper machine used for conduction, pressing, drying, etc. These rollers are generally in the middle of a shell-like body, and the shaft ends are fitted at both ends. They can be roughly divided into three categories: The first type is a roller used for conduction, most of which are made of seamless steel tubes or copper tubes, and have a small diameter (100 to 250 mm) and a lighter weight, such as [Fig.-a] .