The protective breaking resistance design of the project shall be executed for predesign or trial design, which is not only opening up, but also practical.
工程抗断防护设计应进行预设计或试设计，既要有开拓性，又要有现实性。
The protective breaking resistance design of the project shall be executed for predesign or trial design, which is not only opening up, but also practical.
工程抗断防护设计应进行预设计或试设计，既要有开拓性，又要有现实性。
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