鞍形封头
saddle-shaped end closure
半球形封头
Semi spherical head
hemispherical primary head
标准椭圆封头
standard elliptical dished head
standardellipsoidal head
standard elliptical head
ellipsoidal head
standard ellipsoidal head
大型薄壁椭圆封头
Welding of heavy thin-wall ellipse head
大直径高压球封头
large diametral spherical heads used in high pressure vessel
large diametral spherical heads used in high press