It is difficult to demolish structure which has lower heightofgravitycenter, larger supporting surface and mortar rubble with demolition blasting in city.
在城市拆除爆破中，用小孔爆破法拆除重心很低、支承面大的浆砌片石构筑物难度很大。
2
The categorization is based on 4 parameters, namely, flight height, flight Mach number, engine rotational speed and overload on the engine centerofgravity.
选取了飞行高度、飞行马赫数、发动机转速以及发动机重心法向过载等4个参数作为分类的原始依据参数。
3
The parameter ofheightof the center of gravity of motor vehicle is an important parameter in designing calculation and final approving testing of the vehicle.