knapsack lever type sprayer

例句：

1. 1.This backpack sprayer is perfect for outdoor activities like hiking and camping.
   这款背包式喷雾器非常适合户外活动，如徒步和露营。
2. 2.The backpack sprayer has a built-in water reservoir to keep the spray fresh.
   背包式喷雾器内置储水罐，保持喷雾新鲜。
3. 3. The backpack sprayer is easy to use and convenient for carrying around.
   背包式喷雾器使用方便，便于携带。