止: Ⅰ动词1.(停止; 拦阻) stop; cut out 短语和例子终止 stop; end; 中止 stop halfway; discontinue; suspend; 止住伤口出血 stop a wound2.(截止) close; end 短语和例子止于本月末 close at the end of this month; 申请到本月25日止。 the 25th of
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。
