It depends on your ability, generally around 20 thousand, but the treatment is very good and you can enjoy many benefits. Such as medical care and education.
The powder engraving machine is used to cut off the redundant part of the propellant casting and curing molding, eliminate burrs, and make it meet the design size requirements accurately, thus ensuring that the combustion thrust of solid fuel is more in line with the dynamic requirements and does not deviate from the track when it explodes.