conical reducer with straight flange 带折边锥体变径段 conical head with straight flange 带折边锥形封头 plain-straight-face flange 平面法兰 ..
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... the forming of head 封头的成型 toriconical head 折边的锥形封头; 带折边锥形封头; 有折边的锥形封头 torispherical head 带折边的球形封头 ...
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带折边的锥形封头 Toriconical heads ; flanged and conical dished head
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