玻璃珠箱：手动同步离合器，齿轮转动，滚动撒播，可拆装设计。
Glass Beads Box: Hand movement in step clutch, gear cycle, rolling sowing, and disassembly design.
在观察车轮中心：从FAG的滚动轴承的车轮转动，确保可靠。
At the center of the observation wheel: Rolling bearings from FAG which ensure the wheel rotates reliably.
在观察车轮中心：从FAG的滚动轴承的车轮转动，确保可靠。
At the center of the observation wheel: Rolling bearings from FAG which ensure the wheel rotates reliably.
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