本发明涉及一种运动球(1)，包括球芯(2)和由多片皮片(4)组成的球皮(3)。
The invention relates to a sports ball (1) comprising a core (2) and a cover (3) formed from a plurality of panel segments (4).
还详细考虑了堆芯燃料球和石墨球以及反射层石墨中杂质对反应性的影响。
The effects of impurities in the fuel and the graphite element in the core and those in the reflector graphite on the reactivity of the reactor were considered in detail.
还详细考虑了堆芯燃料球和石墨球以及反射层石墨中杂质对反应性的影响。
The effects of impurities in the fuel and the graphite element in the core and those in the reflector graphite on the reactivity of the reactor were considered in detail.
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