2. Pulley is the key to open and close the Ji'nan guardrail is not smooth, the use of rolling bearing nylon wheel.
滑轮是济南护栏启闭是不是顺利的关键所在，应运用滚动轴承尼龙轮。
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3. Pulley: in mechanics, a wheel that carries a flexible rope, cord, cable, chain, or Belt on its rim.
滑轮：力学上的一种装置，在边缘装有活动绳索、弦、缆、链条或带子的轮。
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4. The forward pulley is large and is generally made from an in-line skate wheel.
远期滑轮大，一般是车轮制成一种在线滑冰。
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5. The divided-flow two-level turbine engine with two pumps is composed of a turbine, a turbine shaft, a two-level booster pump wheel, a guide pulley and the expansion chamber shell.
分流式两泵两级涡轮发动机由两级涡轮、涡轮轴、两级增压泵轮、导轮和膨胀室壳体组成。
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6. The divided-flow two-level turbine engine with one pump is composed of a turbine, a turbine shaft, a two-level booster pump wheel, a guide pulley and the expansion chamber shell.
分流式一泵两级涡轮发动机由涡轮、涡轮轴、两级增压泵轮、导轮和膨胀室壳体组成。
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7. The divided-flow two-level turbine engine with one pump is composed of a turbine, a turbine shaft, a two-level booster pump wheel, a guide pulley and the expansion chamber shell.
