由于立式混合机的密闭性及混合过程中推进剂药浆的不均匀性，NEPE推进剂在混合过程中存在燃烧转爆轰的可能性。
NEPE propellant slurry has the possibility of deflagration to detonation transition, because the vertical mixer is hermetic and the propellant slurry is inhomogeneous in the mixing process.
螺旋爆气机由驱动电机，空气轴，螺旋浆片，外壳组成，所有材料都耐腐蚀，浸沉部分由不锈钢或纤维增强材料制成。
Spiral Aerator is consisted of driving motor, air shaft, spiral impeller, out-shell; all the materials are erosion resistance and the dipped parts use stainless iron or FRP.
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