A -closed System的用法和样例：
- Closed system pressure buildup precautions installed.
- To develop this supply True North uses a fast flush closed system.
- A measure of the disorder or randomness in a closed system.
- The purpose of this seminar is to reform the old closed system so as to establish the new system of educational assessment.
- The closed system has a certificate authority as part of one entity.
- Stronger all hydraulic mould closing system.