T-RingT环异常;t环;宝环
babbit t packing ring巴氏合金填密圈
paint t brush ring画笔套圈
D T-Ring型结构
T Barskapets Ring传统金属
bonnet t seal ring阀盖密封环
T regular ringT正则环
T The Ring古典摇滚
T-ring stiffening缝环加劲