On the basis of the analysis of the structure and working principle of air siege back-up combined two types of dependency have access the oil together, articles have to apply the principle of balance and hydraulic equations, formula building drag back and and apply the dynamics solve the back block when the back of the cannon 105 mm M101. This result is used to study the dynamics of the back block problem of artillery of America and some European countries, as well as contribute to solve the problem of fitting the cannon up the wheels in Vietnam.
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