A53 力学计量 标准查询与下载

JJG 641-1990 液化石油气汽车槽车容量试行检定规程

Verification Regulation of Liquefied Petroleum Gas Tank Car Volume

JJG 646-1990 定量、可调移液器试行检定规程

Verification Regulation of Quantitative Adjustable Bipet

JJG 647-1990 罐和桶试行检定规程

Verification Regulation of Tanks and Barrels

JJG 649-1990 数字称重显示器试行检定规程

Verification Regulation for Digital Weighing Indicator

JJG 652-1990 旋转纯弯曲疲劳试验机检定规程

Verification Regulation of Rotating Pure Bending Fatigue Testing Machines

JJG 654-1990 超声硬度计检定规程

Verification Regulation of Ultrasonic Hardness Testers

JJG 2046-1990 湿度计量器具检定系统

Verification Scheme of Measuring Instruments for Humidity

JJG 2048-1990 500～1000K全辐照计量器具检定系统

Verification Scheme of Measuring Instruments for 500～1000K Irradiance Scale

JJG 708-1990 度盘轨道衡试行检定规程

Verification Regulation of a Dial Railway Track Scale

JJG 709-1990 非机车牵引动态称量轨道衡检定规程

Verification Regulation of a Motion Weighing Railway Track Scale Non Locomotive Traction

JJG 711-1990 明渠堰槽流量计试行检定规程

Verification Regulation of Weirs and Flumes for Flow Measurement

JJG 2062-1990 13.81～273.15K温度计量器具检定系统

Verification Scheme of Temperature Measuring Instruments in the Range from 13.81 to 273.15 K

JJG 2066-1990 大力值计量器具检定系统

Verification Scheme of Measuring Instruments for Large Force

JJG 2067-1990 金属洛氏硬度计量器具检定系统

Verification Scheme of Measuring Instruments for Metallic Rockwell Hardness

JJG 2070-1990 200～2500MPa压力计量器具检定系统

Verification Scheme of 200～2500MPa Pressure Measuring Instruments

JJG 2071-1990 压力(-2.5～2.5kPa)计量器具检定系统

Verification Scheme of Measuring Instruments for Pressure(-2.5～2.5kPa)

JJG 2076-1990 电感计量器具检定系统

Verification Scheme of Inductance Measuring Instruments

ASTM E707-90(1996) 使用北卡罗来纳州大学变速摩擦试验仪作防滑测量的标准试验方法

1.1 This test method covers the measurement of skid resistance of paved surfaces or laboratory-prepared specimens using the North Carolina State University Variable-Speed Friction Tester.1.2 The Variable-Speed Friction Tester (VST) is a pendulum-type tester with a locked-wheel smooth rubber tire at its lower end. A stream of water at a selected water test velocity is directed by a nozzle along the specimen surface in the path of contact between the locked-pendulum tire and the specimen. The friction between the tire and the specimen is measured from the energy lost in the pendulum. The tester is suitable for field tests on pavement surfaces as well as laboratory use (see Note 1).1.3 The values measured, VSN (variable-speed (tester) number), represent the frictional properties obtained with the apparatus and procedures stated herein and do not necessarily agree or correlate directly with those obtained by other skid-resistance measuring methods. Note 18212Uneven pavement surfaces in the field may provide inaccurate VSN measurements. Extreme care should be taken when using the VST in the field.1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Standard Test Method for Skid Resistance Measurements Using the North Carolina State University Variable-Speed Friction Tester

JIS B 7433:1989 牛顿计

この規格は，光学部品の表面の真球度及び曲率半径の基準として用いるニユートンゲージについて規定する。

Newton gauges

DLA A-A-50685-1989 单面精度标准水平仪

This commercial item description covers a single face, precision master level used to calibrate other levels.

LEVEL, PRECISION MASTER, SINGLE FACE