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。
For pipelines with a uniform gradient, safety ratio is an important index for evaluating the hydraulic safety of a system.
还有一些低利率、高安全率的长期投资，比如：去健身房锻炼、健康饮食等等。
Other investments are more like low-interest, high security, long-term investments: going to the gym, eating right, etc.
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。
This paper discusses the breakeven point engineering volume, break even point unit price, profit and operating safety ratio in the contract of drilling engineering.
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