您要查找的是不是：
- 自緊式金屬空心O形環(huán)metallic hollow self-energizing O-rings
- 非自緊式金屬空心O形環(huán)metallic hollow O-rings of non self-energizing
- 自緊式金屬空心O形(型)環(huán)metallic hollow O-ring for selfseal; metallic hollow self-energizing O-rings
- 非自緊式金屬空心Ｏ形環(huán)[化] metallic hollow O-rings of non self-energizing
- 任意修形漸開(kāi)線(xiàn)齒輪加工的數值模擬Numerica imitation in arbitraily modified involute gear processing
