Ensure that the height marker is on zero graduation: Fall down the cylinder to check, if any deviation, adjust the two screws of the height marker.
检查定位标是否对零线：将重锤放下观察定位标上刻线是否与零线重合，有偏差时可调整定位标两侧的螺钉。
2
But any detectable deviation from zero would mean that the laws of physics were different there (and then) from those that pertain in the neighbourhood of the Earth.
但任何偏离0的误差均意味着：此地此时的物理学定律与有关地球周边的物理学定律不同。
3
The earth is considered to be balanced in points where this deviation is approaching to zero.