mmc 39 设置数据传输线 自动保留(automatic hold) 专用分机可设定为自动保留，当正在进行中继线通话时，按另一中继线键接听呼叫，原通话自动保留。
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Auto-Hold Automatic Parking 自动驻车
automatic horizontal hold [电子] 自动水平同步
automatic recall on hold 保留电话自动回叫
The access door shall be equipped with a flush aluminum drop handle, which shall not protrude above the cover and an automatic hold-open arm with red vinyl grip on a release handle.
检修门应该配置铝冲落手柄，使其不会伸到盖子上方； 在释放柄上，配置红色乙烯把手的自动开启把柄。
To make more room for passengers, Airbus plans to put the carts in the lower hold; automatic conveyors and elevators will deliver them to the two passenger decks.
空中客车国际财团为了给乘客提供更多的空间，计划将饮食推车放置底层舱，由自动传送带及升降机将饮食车送至两层乘客舱。
They hold the crews hostage with machine-guns and semi-automatic pistols, then force the captain to anchor off the northern part of Somalia’s coast for several weeks until a ransom is paid.
他们用机枪和半自动手枪挟持船员作人质，然后逼迫船长在索马里海岸北部抛锚数周直到收到赎金。
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