regulating speed with variable displacement的用法和樣例：
例句
The organization and principle of the new type of rubber balloon with water volumometer are introduced. 介紹了新型水囊式容積測定儀的結構和原理。
Condensation chambers shall only be installed where necessary for steam and condensable vapor service when using instruments having relatively large volume displacement. 如果使用相對較大容積排水量的儀錶，冷凝腔僅安裝於蒸汽和冷凝蒸氣工況。
