For pipelines with a uniform gradient, safetyratio is an important index for evaluating the hydraulic safety of a system.
对于均匀坡度的管道系统，安全率是评价系统水力安全性的重要指标。
2
This paper discusses the breakeven point engineering volume, break even point unit price, profit and operating safetyratio in the contract of drilling engineering.
探讨了钻井工程承包中盈亏平衡点工程量、平衡点单价、利润及经营安全率等问题。
3
The dynamic shear modulus ratio and damping ratio of soil are indispensability for seismic safety evaluation and soil layer seismic response analysis of engineering sites.