Our main products include chain track, track roller, carrier wheel, guiding wheel, driving wheel, track shoe screw, shaft sleeve, pin, bushing, and link rod, recoil spring etc.

我们公司专业生产挖掘机链轨、链条及支重轮、托链轮、引导轮、驱动齿、履带板螺栓、链销、链通、斗轴、斗轴套、千秋架、弹簧座等系列产品。

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At its most basic level, a roller coaster is a machine that USES gravity to send a train along a winding track.

从最基本的层面来说，过山车是一种利用重力让车体沿着弯曲轨道运行的机器。

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I found out that my right track had thrown to the inside, and had gone completely over the edge of the mine-roller bracket.

我发现我的右履带已经被抛到了里侧，已经完全超出了滚雷装具支架的边缘。

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His photos offer a fascinating peek at North Korean life and culture: Teens skating on a roller track, a woman braving a snowstorm, photos of his in-flight meal on Air Koryo, North Korea's airline.

CNN: Beyond the DMZ: Tweeting from North Korea

Reading Magistrates' Court heard the 42-year-old man fell more than 3m (9ft) as he tried to remove two damaged roller-coaster trains from a track.

BBC: Legoland Windsor fined after worker fell from ride