Being directed against difficult disassemble of unilateral valve from oil isolated mud pump, a simple and effective tool for repairing of unilateral valve is designed.
针对油隔离泥浆泵单向阀拆卸难的情况，设计了简单有效的修复单向阀的工具。
Conclusions The nano particles were isolated and cultured from calcified heart valve of rheumatic heart disease in suitable conditions.
结论：采用合适的方法可以在风湿性心脏病钙化的心脏瓣膜中分离培养出纳米样颗粒。
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