方法一：产品分类(大小类)+标准类别
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[德标]DIN 431 - 2013
六角管螺母、八角管螺母
Pipe Nuts With Thread In Accordance With DIN ISO 228 Part 1
[德标]DIN 80705 - 1990
小对边六角（八角）薄螺母
Thin Nuts with Coarse Pitch and Fine Pitch Thread and with Small Widths Across Flats
[德标]DIN 6434 - 1984
铆钉用具，圆锥端带孔八角铆钉
Rivet Sets
[德标]DIN 431 - 1982
六角管螺母、八角管螺母
Pipe nuts with thread in accordance with DIN ISO 228 Part 1
[俄标]GOST 28919 - 1991
井口设备类型法兰连接 — 密封圈 — П型
Flange Connections of Wellhead Equipment - Gasket - П
[俄标]GOST 28919 - 1991
井口设备类型法兰连接 — 密封圈 — БX型
Flange Connections of Wellhead Equipment - Gasket - БX
[铁道部]TB /T 826 - 1991
锁紧螺母
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