Objective:Through comparing the ultrasonicappearance and pregnant outcome of cystic hygroma of 86 foetus to analyze the antenatal diagnosis and prognosis.
Finally, the welding procedure has been proved to be feasible by as-welded appearance checking, magnetic powder inspection, ultrasonic inspection and radiographic inspection.
最后,本课题通过焊后的外观检测、磁粉探伤焊、超声探伤和射线探伤证明了焊接工艺规范合理可行。
3
The effect of assistance of ultrasonic wave on granule appearance of corn starch and the substitution degree were investigated.