setting head是什么意思

用法例句

The coordinate sample enlarging precission analysis of the whole survey station instrument in construction survey;

全站仪在施工测量中进行坐标放样的精度分析

Aim at characteristics that staking out difficult when doing subgrade construct in mountainous and thick mound area and difficulty of demolish, the text discusses coordinate calculate method of each control factor of subgrade staking out in mountainous district, and application of coordinate staking out method in demolish.

针对山岭重丘区路基施工放样困难、爆破施工难度大等特点,着重讲述山区路基放样中各控制要互助的坐标计算方法及坐标放样法在爆破施工生产中的应用。