再沸器膨胀节的危险截面在波谷、波峰圆弧中点附近，危险点在波谷圆弧中点附近内、外表面和波峰圆弧中点附近内表面处。
The dangerous position are adjacent the centre of the outside and external circular arc surfaces of wave-valley or of external circular arc surfaces of wave-hump at the expansion joint.
再沸器膨胀节的危险截面在波谷、波峰圆弧中点附近，危险点在波谷圆弧中点附近内、外表面和波峰圆弧中点附近内表面处。
The dangerous position are adjacent the centre of the outside and external circular arc surfaces of wave-valley or of external circular arc surfaces of wave-hump at the expansion joint.
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