secondary valve

英 美
  • 二级机械阀
  • secondary adj.次要的；从属的；中等教育的n.副手；次要位置
  • valve n.瓣膜；真空管；阀门；电子管

相关词汇

secondary cup secondary secondary occlusal traumatism secondary finishing operation secondary electron conduction secondary seeding temperature secondary specialized schools secondary processing sequence secondary structural elements secondary teacher preparation secondary emission photo cell Secondary hyperoxaluric state
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