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Welding stress and concaving deformation of man-hole of steel vessel influence directly welding quality and life of using.
钢制容器人孔的焊接应力及塌陷变形,直接影响容器的焊接质量和使用寿命。
n. 凹面
v. 使…凹陷;(concave的现在分词)
Welding stress and concaving deformation of man-hole of steel vessel influence directly welding quality and life of using.
钢制容器人孔的焊接应力及塌陷变形,直接影响容器的焊接质量和使用寿命。