Liquid urea speed reducer, preparation method thereof, and solid propellant
The invention provides a liquid type urea speed reducer, a preparation method thereof, and a solid propellant. The structural formula of the speed reducer is X2NCO(NHCO)mNX2 or X2NCO(NH)nCONX2, wherein X is C2H4CN or hydrogen, and at most two X are hydrogen; and m is 1-10, and n is 0-10. The speed r...
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Format: | Patent |
Sprache: | chi ; eng |
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