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。
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.
雇主应自 行承担风险和费用，按照合同规定的时间和地点供应这些材料。
The Employer shall, at his risk and cost, provide these materials at the time and place specified in the contractor.
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