If bicycle pump, then the alignmenthole - by-blow look at a better effect.
如有自行车打气筒，则对准小孔逐个吹一下效果更佳。
2
This set of components can rotate to the back leakage discharge hole and pump the bottom of the alignment.
这样可以使整套部件旋转至背板漏液排出孔与泵的最底端对齐。
3
The type of explosive used, rock properties, and method of loading and sequence of firing the holes, affect hole depth, diameter, alignment and spacing.