The optimeter is widely used to precisely measure external size ofworkpiece by comparison with a gauge block or standard part.

本仪器是一种采用量块或标准零件与试件相比较的方式测量物体外形尺寸的仪器。

The optimeter is widely used to precisely measure external size of workpiece by comparison with a gauge block or standard part.

本仪器是一般是用标准器（如量块）以比较法测量工件的尺寸。

Now our company is majoring in nuts series: rivet nuts, blind rivet, insert nuts,nylon locknuts, welded nuts, flange nuts and other kinds of auto standard parts.

上海锐拓五金现在主营紧固件系列中的螺母类产品： 铆螺母，尼龙锁紧螺母，焊接螺母，法兰螺母，以及各类汽车标准件。