检查砌砖质量及标定中心线用的测量标桩已经建完，测量仪器准备完毕，校验合格。
Survey pegs for checking brickwork quality and demarcating centerlines have been finished and surveying instruments have been prepared and well checked.
然而，用这种方法得到的零点只能用于校验的目的，而不适合用在仪器的最终应用中。
However, the zero established in this manner is useful only for verification purposes and is of no value in the end application of the instrument.
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