A document may be signed by handwriting, facsimile signature, perforated signature, stamp, symbol or any other mechanical or electronic method of authentication.
单据可以通过手签、签样印制、穿孔签字、盖章、符号表示的方式签署，也可以通过其它任何机械或电子证实的方法签署。
Critical sanding prediction model with perforated well completion was established using the theory and method of rock mechanics based on rock burst criterion.
以岩石破坏准则为基础，采用岩石力学的理论和方法，建立了射孔完井临界出砂预测模型。
The predicted transmission loss of perforated tube silencers using the finite element method and experimental results are compared and showed good agreement.
使用有限元法计算穿孔管消声器的传递损失，并与实验测量结果进行了比较，二者吻合良好。
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