空调的通风、制冷和制暖三种模式为互锁关系。
In machinery space, the valves, pipes should be（） arranged as close to each other as possible to save space。 arranged far away from each other for convenient operation。 be fixed or clamped to avoid vibration。 kept easy removable as to convenient repairing work。
An undocumented vessel with 10 people aboard and operating 25 miles off the seacoast must carry a survival craft of the（）. inflatable buoyant apparatus type。 buoyant apparatus type。 life float type。 Any of the above types are acceptable。
The guard, fencing or shielding for moving parts or machinery can be removed for repair only when the machinery it belongs to（） stays at rest。 is working stably。 is worn out。 is in good operatio。
基础消防大队、中队制定的消防水源资料要是报当地公安部门审核备案，并复制存档。
总需求与总供给的均衡无非表现为三种均衡（）。
