Ensure the sound path is correct which you pressed key.
确保良好的道路是正确的,您按下键。
Ultrasonic flaw location in semisphere butt welds by sound path method is described.
介绍半球对接焊缝超声探伤的声程定位方法。
At the base of the groove, there is a single or double diameter hole, providing a sound path through the panel.
在该基地的沟,有一个单人或双人直径孔,提供一个良好的道路通过小组。
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