您要查找的是不是：
- Waveguide vacuum flange 真空波导法兰
- Ultra-high vacuum flange--Copper seal gaskets 超高真空法兰用铜密封垫
- Some pumps and all vacuum cleaners work by suction. 有些泵和所有真空吸尘器都是借吸力工作的。
- His wife's death left him a vacuum in his life. 他妻子的去世使他的生活变得空虚。
- Her husband's death left a vacuum in her life. 她丈夫的死使她的生活变得空虚。
- Some people are living in a vacuum. 有些人过着与世隔绝的生活。
- A vacuum cleaner is a handy household tool. 吸尘器是一种使用方便的家庭用具。
- The shop repairs vacuum cleaners. 这家店修理吸尘器。
- The porter turned off the vacuum. 清洁工关掉真空吸尘器。
- The symbol for the speed of light in a vacuum. 表示真空中光速的物理符号
- Waveguide vacuum windows 波导真空窗
- Sealed under low pressure or a partial vacuum. 抽空密封的在低压或部分真空状态下密封起来的
- high vacuum flange 高真空法兰盘
- Only one set of flange studs is needed. 只需要一套法兰柱头螺栓。
- The pump power is fed through a second waveguide. 泵的功率通过第二个波导管馈入。
- These include gusset plates welded to the flange. 这些包括焊接到翼缘上的节点板。
- Using thread or flange capillary connection. 采用螺纹或法兰毛细管联接。
- Press the flange and replace the side sealing ring. 压紧法兰（均匀用力）更换侧密封圈。
- Dirt and dust are drawn into a vacuum cleaner by suction. 污物和灰尘被吸入吸尘器。
- Progress on Terahertz Waveguide Devices[J]. 引用该论文 黄婉文;李宝军.
