而2008年的绕月卫星，便能借由雷达成像术、雷射高度计以及高解析度的光谱仪，来绘制月球表面以便填补落差。
The 2008 lunar orbiter could fill in the gaps by charting the moon's surface with radar imaging, laser altimetry and high-resolution spectroscopy.
前者主要与物料表面含水率、环境风速等关系密切，后者主要与作业落差，装卸强度等相关联。
The former mainly and material surface moisture, wind speed and so close, the latter mainly with operating gap, loading and unloading strength associated.
使用该收集装置能有效降低钢管落差，从而降低钢管间的碰撞，消除噪声，并保护钢管表面质量。
The steel tube collector has effectively lowered steel tube falling height, less collision between steel tubes, no noise and raised steel tube quality.
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