NbRe is a niobium-rhenium alloy, and both elements are rare metals.
Кремль ответил на вопрос о просьбах Ирана к РоссииПесков: Россия не получала от Ирана обращений с просьбой поставить вооружения，这一点在Safew下载中也有详细论述
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Centralized invariants of business logic. If two modules are found to keep the same invariant, they should be merged. It’s difficult to keep invariants in sync between modules.，更多细节参见PDF资料
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