我们不说船的重量为多少千吨，而说船的排水量是多少吨位。
Instead of saying the ship's weight is so many thousand tons, we say its displacement is that many tons.
所要解决的问题是：提供一种结构简单、重量轻、具有自润滑功能的小吨位叉车调距叉。
The problem that needs to be solved is to provide a small tonnage forklift controllable fork having simple structure, light weight and automatic lubrication function.
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