求翻译：法兰的类型符合设计要求，安装法兰前对法兰密封面及密封垫片进行外观检查，防止有影响密封性能的缺陷存在。法兰连接埋入土中应采取防腐措施（如涂刷环氧煤沥青或石油沥青）。是什么意思？

Meet the design requirements of the type of flange, mounting flange before the flange gasket sealing surface and visual inspection, to prevent the existence of defects affect the sealing performance. Flange in the earth should take anti-corrosion measures (such as brushing epoxy coal tar or asphalt)

Flange type flange before installation, conform to the design requirements for sealing the flange face and sealing gaskets appearance inspection, so as to prevent any impact of sealing performance deficiencies exist. Flange connections lie buried in corrosion protective measures should be taken (suc

The flange type conforms to the design requirement, installs in front of the flange carries on the viewing test to the flange packing surface and the seal filling piece, prevents the influential sealing property the flaw existence.The flange connection buries is buried should take the anticorrosion

Flange type meet design requirements, before installing a flange gasket and flange seal surface Visual inspection to prevent defects that affect seal performance. Flange connection buried soil protection measures should be taken (such as brushing epoxy coal tar or bitumen).

Meet the design requirements of the type of flange, mounting flange before the flange gasket sealing surface and visual inspection, to prevent the existence of defects affect the sealing performance. Flange in the earth should take anti-corrosion measures (such as brushing epoxy coal tar or asphalt)