您要查找的是不是：
- 属-非金属双O型环密封metal O-ring and nonmetallic O-ring seal; metallic-nonmetallic O-ring seal
- 金属-非金属双O型环密封metal O-ring and nonmetallic O-ring seal
- 橡胶双O型环密封double O-ring rubber seal
- 本阀阀杆密封分为两种形式：一为填料密封；一为O型密封环密封。It has two stem sealing:one is stuffing box and another is toroidal sealing ring (O-ring).
- 双pair
- 密封垫和o型环是由人造橡胶制成的。Gaskets and O rings are made of elastomers.
- 属genus
- 黄铜灰尘罩,带O形环密封和橡胶系链Brass dust cap with O-ring seal and rubber tether
- 双击double-click
- 双O形圈自紧式密封结构的分析与设计Analysis and Design of Self-energizing Sealing Devices with Double O-Rings
- 属的generic
- 双语diglossia
- 外型exterior
- 双流环密封double-flow sealing structure
- 双赢Win-win
- 户型house type
- 圆环traffic circle
- 双色two-tone color
- 机械浮环密封mechanical floating ring seal
- 双线crewel
