要准确地估计挖泥船的性能，提高疏浚能力，必须详细地记录各挖泥船在各施工环节中的有关数据。
To evaluate correctly the behavior of a dredger and raise its capacity of execution, all working data should be recorded in detail when the dredger is under operation.
要准确地估计挖泥船的性能，提高疏浚能力，必须详细地记录各挖泥船在各施工环节中的有关数据。
To evaluate correctly the behavior of a dredger and raise its capacity of execution, all working data should be recorded in detail when the dredger is under operation.
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