“grooveless”簡單造句，grooveless造句子

1、For grooveless oxide layers, the anodic plasma oxidation technique has also yielded encouraging results.

3、The application of grooveless rolling in the splitting rolling of small size thread steel has been described in this paper.

2、Audio High Density. System of digital audio recording on grooveless discs, employing an electronically-guided capacitance pickup.