In the case of an intermediate contract depth, the work to deepen the well would likely be done on a day-rate basis, or a "time and Materials" contract.

如果是中间点合同深度，则对井眼的加深作业可能采取日费合同或“时间和材料”合同。

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You will be able to sign up as part of a corporate account, as a small company or an individual for unlimited service at the going rate (depending on the length of the contract you sign) or on a per-day basis.

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