1) Minimum of three tack welds.
至少三处定位焊。
2) it will be stable at least.
至少会保持稳定。
3) first break positioning
初至波定位
1.
This method uses first break positioning, but the positioning seismic-source, the air-gun is replaced by a high-power, low-frequency sonar which work at frequency band of 1000Hz.
该方法采用1000Hz频段的大功率低频声纳取代气枪阵列作为定位震源,其余部分按照初至波定位方法进行二次定位。
2.
There are acoustic positioning system and first break positioning system in current secondary positioning .
当前二次定位系统有声波定位系统和初至波定位系统。
5) at (the) most/least
至多/至少
6) teenager
[英]['ti:neɪdʒə(r)] [美]['ti'nedʒɚ]
n.(十三至十九)青少年
补充资料：至少
1.副词。表示最小的限度。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条