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additional equipment , attached device
Optional equipment means greater weight.
选装配置意味着增大重量。
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The belt splice detector is optional equipment.
带接头探测器是可选的设备。
Model features a rigid keyboard shelf, and is available with a variety of optional equipment.
产品采用了坚固的键盘架，并配有多种可选的设备。
That encourages customers to spend more on optional equipment.
ECONOMIST: The global car industry
The Odyssey also has some new optional safety equipment, including forward collision and lane departure warning systems.
WSJ: Honda Odyssey: The minivan with its own vacuum
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