1991 year China issued GB standards list


	GB/T 13141-1991 Greek alphabet coded character set for bibliographic information interchange 书目信息交换用希腊字母编码字符集
	GB/T 13142-1991 Extension of the Latin alphabet coded character set for bibliographic information interchange 书目信息交换用拉丁字母代码字符扩充集
	GB/T 12930-1991 Technical specification for high pressure reciprocating air diving apparatus 潜水装具用高压活塞式空气压缩机技术条件
	GB/T 12911-1991 Paper and board--Determination of the ink absor-bency 纸和纸板油墨吸收性的测定法
	GB/T 12756-1991 Steel wire ropes for rubber hose 胶管用钢丝绳
	GB/T 12919-1991 Cleaning equipments of controled air source for ship 船用控制气源净化装置
	GB/T 13269-1991 Atmospheric air--Test dust standard sample--Fly ash 大气试验粉尘标准样品煤飞尘
	GB/T 13157-1991 Overall electro-acoustic frequency response for reproduction of 35mm optical sound track--Reproduction characteristics 35 mm影片光学声迹的还音电声频率响应特性
	GB/T 13240-1991 Iron ore pellets--Determination of relative free swelling index 铁矿球团相对自由膨胀指数的测定方法
	GB/T 12795-1991 Fixed capacitors for use in electronic equipment--Part 15:Blank detail specification--Tantalum capacitors with non-solid electrolyte and porous anode--Assessment level E 电子设备用固定电容器第15部分:空白详细规范非固体电解质多孔阳极钽电容器评定水平 E (可供认证用)
	GB/T 13230-1991 Plain detonators 工业火雷管
	GB/T 12847-1991 Blank detail specification for hydrogen thyratrons 氢闸流管空白详细规范 (可供认证用)
	GB/T 12709-1991 Lubricating oils--Determination of aging characteristics--Conradson carbon residue method 润滑油老化特性测定法 (康氏残炭法)
	GB/T 13235.1-1991 Petroleum and liquid petroleum products--Volumetric calibration of vertical cylindrical metal tanks--Strapping method 石油和液体石油产品立式圆筒形金属油罐容积标定法 (围尺法)
	GB/T 13299-1991 Steel--Determination of microstructure 钢的显微组织评定方法
	GB/T 12787-1991 Warning equipment for criticality accidents 临界事故报警设备
	GB/T 13152-1991 Blank detail specification for reverse conducting triode thyristors，ambient or case-rated，5A/5A and above 5A/5A 以上环境或管壳额定逆导三极晶闸管空白详细规范
	GB/T 13302-1991 Steel--Determination of area content of graphite-micrographic method using diagrams 钢中石墨碳显微评定方法
	GB/T 13158-1991 Compatibility test procedures of clock and synchronization equipment of digital switch introducedinto digital network 数字交换机的时钟和同步设备进入数字网的兼容性测试方法
	GB/T 13192-1991 Water quality--Determination of organic phosphorous pesticide in water--Gas chromatography 水质有机磷农药的测定气相色谱法

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