per trip .. $ 4 200 to 300 tons measurement do . 5 300 to 400 tons hours or frction thereof said boats to be charged at the rate of $ 1 less than this rate in each case . flat boats containing glass - house sand , wood , etc. , $ 2 per trip .
we are large mining machinery manufacturer and exporter, located in Zhengzhou, Henan, China.
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