15 GB/T 1149.7-1994內燃機活塞環螺旋撐簧油環Internal combustion engines--Piston rings--Coil-ring-loaded oil control rings 16 GB/T 1150-1993內燃機濕式鑄鐵氣缸套技術條件Internal combustion engines--Cast iron wet type cylinder liners--ecification 17 GB/T 1151-1993內燃機主軸瓦及連桿軸瓦技術條件Internal combustion engines--Main and coecting rod bearings--ecification 18 GB 1576-1996低壓鍋爐水質Water quality for low preure boilers 19 GB/T 1859-1989內燃機噪聲聲功率級的測定準工程法Determination of sound power levels of internal combustion engines noise—Quasi-engineering method 20 GB/T 1883-1989往復活塞式內燃機術語Reciprocating internal combustion engines—Terminology21 GB/T 1921-1988工業蒸汽鍋爐參數系列ecificatio for industrial steam boiler 22 GB/T 2785-1988內燃機氣門彈簧技術條件Internal combustion engine--Technical requirements for valve rings 23 GB/T 2940-1982柴油機用噴油泵、調速器、噴油器彈簧技術條件Technical ecificatio of rings for fuel pump, governor and injecter of diesel engines 24 GB/T 3166-1988熱水鍋爐參數系列ecificatio series of hot water boiler 25 GB/T 3821-1983中小功率內燃機清潔度測定方法