盲设备口及人孔所用的垫片、螺栓及螺母在买方图纸或数据表中指定。
Gaskets, bolts and nuts for blind nozzles and manholes shall be as specified in Purchaser's drawing or data sheet.
上海凌锐紧固件有限公司是一家专业生产和销售各类高强度螺栓，螺母，垫片及各种非标件的制造商。
Shanghai Lingrui Fasteners Co., Ltd is a manufacturer of various kinds of high strength bolts, nuts, washers and various non-standard parts.
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