求翻译：混凝土的配合比应根据原材料性能及对混凝土的技术要求进行计算，并经试验室试配试验，再进行调整后报工程师同意，并签字确认是什么意思？

Concrete mix shall be calculated based on the performance of raw materials and concrete technical requirements and laboratory test with the test, and then adjusted reported to the consent of the Engineer, and signature confirmation

With the concrete than raw materials should be based on performance and the technical requirements of the concrete, and the laboratory tests with test, and then make the adjustments, engineers agree that, and signature confirmation

The concrete mixture ratio should carries on the computation according to raw material performance and to the concrete specification, and tries after the test chamber to match the experiment, after again carries on the adjustment to report engineer to agree, and signature confirmation

Mix should be based on material properties of concrete and concrete requirements for calculation and distribution test of laboratory, then adjusted engineers agree and sign

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