stem packing的意思|示意
stem packing相关短语
1、 The preschooler and the injection 学龄前儿童与注射
2、 mobile preschooler 学龄前流动儿童
3、 the preschooler 学龄前儿童
4、 preschooler s pretence 学前儿童假装
5、 On Pushing Preschooler 浅谈学前教育
stem packing相关例句
Stem is non - rotating, resulting in lower friction of all moving parts and longer stem packing life.
阀杆是不旋转的, 这样就减少了所有运动部件的磨损,延长了阀杆填料的使用寿命.
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