check valve spring造句

例句与造句

1. Features a modular design concept which facilitates complete maintenance and assembly by retaining the spring load . first and second check valve spring modules are not interchangeable
   特点在于模块设计概念，通过保持弹簧负载促使日常维护和总成的完善。第一和第二止回阀弹簧模块不能互换。
2. It's difficult to find check valve spring in a sentence. 用check valve spring造句挺难的