automatic supply การใช้

• However, when the automatic supply ship MR2 ( Moon Rocket 2 ) fails to launch Henderson and the children make a desperate rescue attempt with Jimmy's pet Hamlet ( now a guinea pig ).
• Some simple oxygen rebreathers had no automatic supply system, but only the manual feed valve, and the diver had to operate the valve at intervals to refill the breathing bag as the volume of oxygen decreased below a comfortable level.