The upper ring or rings are to prevent compression leakage; the lower ring or rings control the amount of oil being deposited on the cylinder wall.

上部的活塞环用来阻止压缩空气泄露；而下部的活塞环用来控制气缸壁上存留下来的机油数量。

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A core regulating pad ring is padded on the lower ring of the thrust bearing, which can make the hook swing in any directions corresponding to the connecting cylinder.

在推力轴承下圈垫上调心垫圈，可使吊钩相对连接筒在任意方向上摆动。

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The silver ring centered on her lower lip gave her a pouty look, or rather accented the pout of her dark eyes and dark hair and the donned hood of the hoodie and the fact that she was frequently pouting.

NPR: Excerpt: 'Estrellas y Rascacielos'

According to the ETF Finder at ETF Channel, NEM makes up 8.98% of the iShares MSCI Global Gold Miners Fund ETF (RING)which is trading lower by about 0.8% on the day Thursday.

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Like the HC1, the HC3 records up to 1080i onto standard mini-DV cassettes in HDV format, but it ups the ante with stills up to four megapixels (and even simultaneous widescreen 2.3 and 4:3 1.7 megapixel stills while shooting video), although it has a lower gross pixel count, no manual focus ring, and we've heard grumblings of a "noisier" picture.

ENGADGET: Sony HDR-HC3 cam is real, promises to bring HD recording "mainstream"