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
standardellipsoidal head
standard elliptical head
ellipsoidal head
standard ellipsoidal head
standard elliptical dished head
错排孔板型封头结构
staggered perforated plate header configuration
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