handhole

handhole

1

Reasons and Solution for Leakage from Header Handhole on Economizer of Boiler

锅炉省煤器联箱手孔泄漏原因及解决方法
2

The position of case handhole is usually measured with vernier caliper , but it 's not accurate .

手表表壳柄孔的位置度通常用游标卡尺测量，但用这种方法测量，表壳柄孔左右偏移量较大。
3

In order to improve the measurement and to have a more convenient and accurate means of measuring , this article introduces the measuring principles and methods of the instrumentation made by Qingdao Watch Factory to the position of case handhole .

为了给打柄孔工序提供准确且简单的测量手段，本文介绍了青岛手表厂设计制造的表壳柄孔测量仪的测量原理及测量方法。