文章摘要:This standard covers the minimum requirements for special-purpose, enclosed, precision single- and double-helical one- and two-stage speed increasers and reducers of parallel-shaft design for petroleum, chemical and gas industry services. This standard is primarily intended for gear units that are in continuous service without installed spare equipment. Gear sets furnished to this standard shall be considered matched sets.

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文章来源：《石油和化工设备》 网址: http://www.syhhgsb.cn/qikandaodu/2021/1110/989.html

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