设计：以患者为研究对象，以诊断为依据的随机对照研究。单位：一所大学医院的综合科、康复室及超声波室联合进行的课题研究。
DESIGN: Randomized case control study to patients based on diagnosis SETTING: department of general diseases, rehabilitation room and ultrasound department of a university hospital.
在故事的结尾，杨和怀孕的薛来到一个医生的办公室，手里拿着他们健康的未出生的孩子的超声波照片灿烂地笑着。
At the end of the story, Yang and a pregnant Xue emerge from a doctor's office, beaming and holding an ultrasound image of their healthy, unborn child.
超声波浴(2)，在清洗珠宝和实验室设备时更加常用，它成为了烹饪实验室中炸薯条的关键工具。
The ultrasonic bath (2), more commonly used to clean jewelry and lab equipment, became a key tool in the creation of the lab's French fries.
回顾了实验室中超声波测量Q值的四种常用方法：上升时间法、回声法、频谱振比法和波形反演法。
The four common ultrasonic methods for measuring Q value in the laboratory, rise time, pulse echo, spectral ration and waveform inversion techniques are reviewed.
成立超声波电子焊接实验室。
得出液氮研磨-超声波破碎法是一种稻曲病菌厚垣孢子破壁的有效、简便、适宜在实验室应用的方法。
Therefore, liquid nitrogen grinding plus ultrasonic crushing method is an effective, economic, convenient wall-breaking method for U. virens in the laboratory.
通过采用实验室模拟进行当量测试，确定了管道焊缝超声波探伤的工艺和仪器参数，并成功应用于某电厂高压导汽管焊缝高温状态的检测。
Through laboratory simulation tests, the procedure and instrument parameters of ultrasonic testing for pipe welds were educed and successfully applied to the high temperature det...
通过采用实验室模拟进行当量测试，确定了管道焊缝超声波探伤的工艺和仪器参数，并成功应用于某电厂高压导汽管焊缝高温状态的检测。
Through laboratory simulation tests, the procedure and instrument parameters of ultrasonic testing for pipe welds were educed and successfully applied to the high temperature det...
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