例句與造句

1. One check ball valve part of this type of valve , which includes a check valve and rotary movements kai - check china valve
   其中止回閥就屬于這種類型的閥門，它包括旋啟式止回閥和升降式止回閥。
2. It's difficult to find check ball in a sentence. 用check ball造句挺難的