Search results for: '实验室地面出现溢水的主要原因之一是忘记关闭水龙头，尤其停水时忘关水龙头，因此离开实验室时要认真检查。 (2 分)A正确B错误'
- Shape
- Rod Material
- Clear All
-
LaserLine Laser Rod 10' + inches cut/fill only - GR1000ICF$202.50The Direct Reading or True Elevation (also known as Lenker style) is a grade rod with a movable tape face allowing you to set the actual benchmark elevation, or any elevation, above or below the bench into the rod. The actual true elevation above sea level is read on these rods, thus eliminating errors caused by adding or subtracting. Since NO math is involved, grade shots are much faster than conventional style rods.
Learn More