鞍形封头
saddle-shaped end closure
半球形封头
Semi spherical head
hemispherical primary head
锅筒椭圆形封头
boiler drum ellipsoidal head
立式椭圆形封头容器
vertical vessel with elliptical head
球冠形封头
spherical cap-shaped head
卧式椭圆形封头容器
horizontal type elliptical head vessel
卧式无折边球形封头容器
horizontal type flapless spherical head vessel