tonnage mark

例句：

1. 1.The government has introduced a new tonnage mark system for the country's oil industry.
   政府为该国的石油行业引入了一种新的吨税标记系统。
2. 2.The tonnage mark is used to measure the weight of goods in metric tons.
   吨税标记用于测量货物的重量，以公吨为单位。
3. 3.The tonnage mark is also used to calculate taxes based on the value of goods.
   吨税标记还用于根据货物的价值计算税款。