ring spot

Spot evaluation test, which was carried out by the method of corrosion test ring, results show: composite inhibitor is consistent to saturated saltwater drilling fluids, its inhibition efficiency is about 90%.

运用腐蚀试验环法进行现场评价试验，结果表明：该复合缓蚀剂和饱和盐水钻井液配伍性良好，现场缓蚀率达到90%左右，效果明显。

A preliminary study on the ring spot of California Privet

金叶女贞轮纹病的初步研究

The ring output spot of the fundamental mode is obtained from a high gain TEA CO2 laser by experiment.

通过实验在高增益的TEA CO2激光器中，得到了基模环形光斑输出。

Test Effect on Fungicide Control Rheum Ring Spot in Indoor

生物药剂防治大黄轮纹病室内药效试验

On the spot it had occupied was a circular space, exposing an iron ring let into a square flag-stone.

在大石所呆的地方出现了一个圆形的空间，中间有一块四方形的石板，上面有一个铁环。