这比蓝宝石陶瓷材质弹性好，机械滞后小，热匹配好，制造工艺简单。
Comparing with sapphire, SSC possesses better elasticity, small mechanical hysteresis, better heat match etc.
分析其原因，这与当前生物实验教学的相对滞后，教学方式的机械、僵化有着极大的关系。
We found that, nowadays, it associated with the lag of biology experiment teaching, old and fossible teaching method.
这种抽油泵柱塞游动阀采用机械强制开启和关闭的结构，柱塞为等径光管、浮动结构，可防止发生气锁游动阀、阀球关闭滞后、砂卡柱塞现象。
The travelling valve of the pump is designed to be closed and opened forcibly, and the pump plunger adopts equal-diameter bare pipe with a floating structure to prevent gas lock and sand sticking.
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