fish backs spreader

例句：

1. 1. Thefish backs spreader is an essentialtool for fishing in deep waters.
   鱼背式撒网机是钓鱼时在深水中必不可少的工具。
2. 2. The fish backs spreader was invented to improve the efficiency offishing.
   鱼背式撒网机被发明出来是为了提高捕鱼的效率。
3. 3. The fish backs spreader is used by fishermen to catch larger fish.
   鱼背式撒网机由渔民用来捕捉较大的鱼。