S形封头  s-head

S型封头  s-head

鞍形封头  saddle-shaped end closure

凹形封头  concave head

半球形封头  Semi spherical head; hemispherical primary head

半球型封头  hemispherical head

变径封头成形  reduced head shaping

标准碟型封头  standard butterfly head

标准封头  Standard close over

标准椭圆封头  standardellipsoidal head; standard elliptical head; ellipsoidal head; standard ellipsoidal head; standard elliptical dished head

标准椭圆形封头  standard elliptical head

薄壁封头  laminose formed head

不对称封头  Asymmetric head

成形封头  completed convex head

冲压封头  bumped 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

大型带法兰封头  Large Head with Flange

大直径封头  large diameter dome

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