small diameter tubes 小直径导管
thick-wall small-diameter tubes 厚壁小径管
small-diameter boiler tubes 小口径钢管
This paper introduces the ultrasonic inspection technics in the butt welded-joints of T91 small diameter tubes, and discusses its technical feasibility.
介绍t 91钢小径管焊接接头的超声波探伤工艺，并就工艺的可行性进行探讨。
Small diameter spiral tubes were employed in the evaporating section of a segregation type heat pipe.
将小螺旋管应用于分离式热管的蒸发段。
The status of the radiographic technology for the butt-welded joints in small diameter tubes are re-viewed briefly. The key points are discussed for the development of radiographic technology.
简要评述小直径管对接焊缝射线照相的特点、方法以及现行技术规定。
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