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See Chinese contents: GB/T 37682-2019 GB/T 37682-2019: Large exposed gear steel castings -- Technical specification
This Standard specifies the ordering requirements, manufacturing process, technical requirements, inspection rules and test methods, acceptance and quality certification, identification and packaging of large exposed gear steel castings. This Standard applies to the ordering, manufacture, and inspection of large gear steel castings in the form of exposed drive, which are cast using the sand mold.
