茧状挂炉可以360度旋转，它由碳素钢或不锈钢制成，可根据您的天花板来调节挂炉高度。
Coocon Fireplace can rotate 360 degrees and it comes in black or stainless steel with varying pole heights to accommodate your ceiling.
浮鞋的外壁由钢制成，且一般与套管的尺寸和丝扣匹配，然而浮鞋的钢级不一定要与套管钢级一致。
The outer portions of the float shoe are made of steel and generally match the casing size and threads, although not necessarily the casing grade.
由于碳在这类钢中的含量很高，用高碳钢制作的零件通常很难被加工和焊接。
Since the carbon content of these steels is so high, parts made from high carbon steel are normally difficult to machine and weld.
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