A feeler gauge a dial indicator or a cam-angle meter can be used to test the amount of contact-point opening.

测隙规、千分表或触点闭合角测定表也可检测触点开度。

youdao

A feeler gauge a dial indicator or a cam-angle meter can be used to test the amount of contact-point opening.

测隙规，千分表或触点闭合角测定表也可检测触点开度。

youdao

A device with an opening of one square meter can extract about 10 tons of carbon dioxide from the atmosphere each year.

这项设备1平方公尺的开口，每年即可从大气中抽取10吨二氧化碳。

youdao

The smallest of these is an opening of less than one meter;

VOA: special.2009.04.15