另一类伪混沌跳时（PCTH），其核心思想是构造伪混沌序列并用码序列来调制脉冲 l 宣室唑皇奎兰堡：兰婴壅竺兰垡笙塞 笙二童塑童萱望堡丝坌 位置，从而提高U...
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PCTH tested valve has the function of being open state constantly and that keeping on open after annulus pressure relived out makes it much handy and be liable to be used.
PCTH测试阀可实现持开的功能，环空泄压后仍能保持开启状态，使用起来更加方便、灵活。
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