发布时间:2025-01-19 13:05:28
GB/T13681-1992。
根据百度百科资料,din929标准为六角焊接螺母,其对应的国家标准为GB/T13681-1992。
六角焊接螺母是六角型用于焊接的螺母。外形是六角形,一面和六角螺母一样,另一面有三个焊点和一个凸台。三个焊点用于焊接,凸台用于定位。
我住的地方要开发成小高层商品房.在开发的商品楼房旁边有多家私人危房,无人居住,也未拆迁。
2025-01-19 13:05:28 2025-01-19 13:05:28 2025-01-19 13:05:28 2025-01-19 13:05:28 2025-01-19 13:05:28 2025-01-19 13:05:28下图所示装置有多种用途,请回答下列问题:(1)洗气:除去CO2中的水蒸气,装置内应盛的物质是______.(
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