The totaltonnage of each product that they import per year.
他们进口的每件产品的年进口总量。
2
In 1880 its exports of manufactured goods accounted for 40% of the global total, and by 1890 it owned more shipping tonnage than the rest of the world put together.
Xingfa Aluminium covers 900,000 square meters of total floor space, owns totally 43 aluminium extrusion production lines including large tonnage extrusion presses.