CASE CAPACITY(弹壳容积) is an important consideration (是一个应重点考虑的问题). Although outside dimensions of case are rigidly (严格地) controlled, case wall thickness and internal dimensions often vary greatly from manufacture to manufacture & there are even some variations in CASE CAPACITY is an important consideration (is an important consideration). Although outside dimensions of case are rigidly (strictly) controlled, case wall thickness and internal features are often rare as rare to manufacture & there are even Some variations in