名词
中文翻译：活塞式背包喷雾器
同义词：
['piston-operated backpack sprayer', 'piston-powered backpack sprayer']
例句：
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1. This piston-type knapsack sprayer is incredibly efficient for outdoor activities.
这款活塞式背包喷雾器在户外活动中非常高效。
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2. The engineer designed the piston-type knapsack sprayer to meet the needs of the construction industry.
这位工程师设计了活塞式背包喷雾器，以满足建筑业的需求。
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3. The piston-type knapsack sprayer has become a popular choice for those who need to carry heavy equipment on their backs.
活塞式背包喷雾器已经成为那些需要背负重型设备的人的首选。