New structure of compression molding mold was designed and manufactured, and the long term test was developed on the original cap making machine.
开展了新结构压塑成型模具的设计、制造工作，并在原制盖机上进行了长期试验。
The specifications for seat sealing test, body sealing test, body strength test, valve long term test, fatigue strength test and operation torque of plastic valves were summarized.
汇总了塑料阀门产品所需性能要求的阀座密封试验、阀体密封试验、阀体强度试验、阀门长期试验、疲劳强度试验和操作扭矩的规定。
To study this property, a long-term test method has been used for many years.
为了研究这种性能，许多年来一直采用传统的长期试验方法。
However, restricted by the long-term test-oriented trend, education has gradually lost its original purpose.
然而长期以来在应试教育的制约下，教育的本真意义已逐渐丧失。
However, restricted by the long-term test-oriented trend, education has gradually lost its original purpose.
然而长期以来在应试教育的制约下，教育的本真意义已逐渐丧失。
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