Conclusion: the 3 maternal serum markers may become an effective method for prenatal screening of the important fatal defects.
结论以上3种生化指标联合检测为产前诊断严重胎儿缺陷的有效方法。
The exact rotor position is required while a brushless DC motor (BLDCM) is under commutation and control. Howere, posi2 tion sensors have some fatal defects.
无刷直流电机的换相和控制都需要准确的转子位置信息，然而安装转子位置传感器有其难以克服的缺点。
The exact rotor position is required while a permanent magnet brushless servo motor (PMBSM) is under commutation and control. Howere, position sensors have some fatal defects.
永磁无刷伺服电机的换相和控制都需要准确的转子位置信息，然而位置传感器有其难以克服的缺点。
Slightly Unacceptable product: it refers to the unit product that has one more general or slight defects, but without fatal or severe defects.
轻不合格品：有一个或一个以上一般缺陷或轻微缺陷，但不包含致命和严重缺陷的单位产品。
Slightly Unacceptable product: it refers to the unit product that has one more general or slight defects, but without fatal or severe defects.
轻不合格品：有一个或一个以上一般缺陷或轻微缺陷，但不包含致命和严重缺陷的单位产品。
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