roll gap的用法和樣例：
例句
- These are significantly used for reference for the design of leveler and gap setting during the actual process of leveling.
這對矯直機的設計和實際矯直中的輥縫設定有借鑒意義。 - Also discussed are relevant issues concerning use of the equation of piercer roll opening to determine the said conical angle.
探討了利用斜軋穿孔機軋輥開度方程來選擇頂頭平整段錐角的有關問題。
