1)  length measuring unit
测长机
1.
：Describe the V belt measuring project and measuring method, privides the structure of the transmission belt length measuring unit and operation principle.
对V带测量项目、测量方法作了介绍并对传动带测长机结构及工作原理作了阐述。
2)  TWIN-CHECK1200 length measuring machine
TWIN-CHECK1200测长机
1.
The uncertainty evaluation of measuring results about indicator error of digital dial gauge 0~25 mm was analyzed in this article,those indicated that it was feasible using TWIN-CHECK1200 length measuring machine as calibration tools.
介绍了0~25 mm数显千分表的示值误差测量结果的不确定度分析,表明了用TWIN-CHECK1200测长机进行校准的可行性。
3)  laser measuring machine
激光测长机
1.
The multi-purpose laser measuring machine is one kind of length measuring instruments which can be used to take measurement relatively and absolutely,it is widely used in geometrical quantity measurement.
万能激光测长机是一种可以进行绝对测量和相对测量的长度计量仪器,用途非常广泛。
4)  warping clock arrangement
整经测长机构
5)  length measuring
测长
1.
Photoelectronic length measuring system for steel pipe and error analysis;
钢管光电测长系统及误差分析
2.
This paper simply summarized the present situation of the length measuring equipment for steel tube in China,emphatically introduced a mechatronic length measuring device as well as its measuring method,described the key technical essential factors concerning the measurement and control system and the logic completely and deeply.
概述了国内钢管测长设备的现状,着重介绍了一种机电式钢管测长装置及其测量方法,对其测量控制系统和它的测控逻辑等关键技术要素进行了较为完整和深入的描述。
6)  length-measuring
测长
1.
Then I will talk about digest about the length-measuring system and the amelioration after repairing the photoelecaricity-accepting board of the system.
管加工厂两条套管线:一条钢管线上,各有一条引进美国的称重、测长、打印设备,用来对钢管测长并将管长数据打印到钢管上。
参考词条
补充资料：测长机
    　　以线纹尺的刻度或光波波长作为已知长度，利用机械测头进行接触测量的光学长度测量工具（图1）。测长机具有能在3个坐标内移动和2个坐标内转动的可调工作台，还带有不同测头和附件，常用于检定大尺寸量块和测量多种工件的内、外尺寸。测长机有 1米、3米、6米和6米以上等几种测量范围，分度值通常为1微米。为求结构紧凑，多数测长机不采用阿贝原则（见长度测量工具），而采用爱宾斯坦光学系统。这种光学系统能自动补偿由于导轨直线度误差引起的测量误差。
　　
　　测量范围在1米以内的习惯上称为测长仪（图2），它利用读数显微镜和带有线纹尺的测量轴组成的测量系统（习惯上称为阿贝头）进行接触测量。阿贝头的示值范围一般为 100毫米。测长仪有立式和卧式两种。它的结构设计一般符合阿贝原则，故通常也称为阿贝测长仪。立式测长仪和卧式测长仪的测量范围通常分别不大于250毫米和600毫米(测量范围大于100毫米时需要用量块调整零位)。前者主要用于测量外尺寸,后者主要用于测量较大工件或在立式测长仪上不易定位的工件如圆盘等的内、外尺寸等。
　　

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