sheathe 托福

The result shows that inspecting cabtyre sheathing by ultrasonic is feasible, and the immersion method would be the most reasonable one.

提出了采用水浸法及聚焦探头是比合理的探伤方法，同时为超声波应用于硬质橡胶材料的质量检测提供了一定的依据。

A sheathed heater is used for the drying heater,Also the heater box had a structure to which rectification is added so that it has better temperatures and hot airset temperature is smaller.

整流式加器提高温度控制效果，使树脂干燥温度设定温度基本一致。