ribbed cylinder
... ribbed plate 加强板,肋板,肋形垫... ribbed cylinder 肋式汽缸 ribbed funnel 线沟漏斗 ...
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... gilled cowling 带鱼鳞板整流罩... gilled cylinder 肋式汽缸 gilled rings 腮环 ...
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肋片式汽缸 finned cylinder ; fi edcylinder
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