“crossover subs”的概念、定义、翻译、参考文献-科学参考

单词	crossover subs
释义	crossover subs Encyclopedia 工学接头释 crossover subs接头用以连接不同尺寸、不同螺纹类型钻杆的连接部件。又称转换接头、配合接头。
随便看	cobordant structures cobordism cobordism class cobordism group cobordism invariant cobordism of complexes cobordism of knots cobordism of links cobordism of manifolds cobordism ring cobordism theory coboundary coboundary group coboundary homomorphism coboundary mapping coboundary operator cobounded cobounded subset cobounded subspace COBRA cobra cobrotoxin cobweb equation cobweb plot cobweb theory of agricultural products price

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