对于不同内部介质接触的部件，如外表面、防护罩及支承凸缘等不需腐蚀余度，地脚螺栓除外。
No corrosion allowance is required for such parts not in contact with the inside fluid as the outside surface of shell, skirt, support lugs and so on, except for anchor bolts.
有径向凸缘及在与轴承轴心线垂直的支承表面上有供其安装用的螺钉孔的一种座。
A radial flange and in line with the bearing axis perpendicular to the bearing surface for the installation of a screw hole with a seat.
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