When spodumene was added in the products, the cause for reducing firing temperature, enhancing mechanical strength and heat-shock resistance, possessing good chemical stability was clarified.

Cod and haddock in the Barents Sea have been found to flee the area when air guns start firing, drastically reducing fish catches for days.

Trajectory deflection correction by miniature pulse thruster groups is an efficiency method of improving rocket projectile firing precision and reducing the scattering of impact point.