Toriconical heads 带折边的锥形封头 Torispherical heads 带折边的球形封头 ..
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flanged and conical dished head
带折边的锥形封头 flanged and conical dished head; toriconical heads 带折边锥形封头 conical head with straight flange; conicalheadwithstraightflange .
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