proportional limit,比例极限 proportional plus derivative action；PD-action,比例微分作用；PD-作用 proportional plus derivative control,比例微分节制 ..
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pd action 比例微分作用
Objective: To observe the clinical effect of Jingtongxiao (JTX) Formula on treating Primary Dysmenorrhea (PD) of congealing cold and blood stasis, and to explore its mechanism of action.
目的：观察“经痛消方”治疗寒凝血瘀型原发性痛经的临床疗效，并初步探讨其作用机理。
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