Cold-proof is a major problem to electric locomotive running safety when it runs in the northeast Chi-na for the first time.

电力机车初次在东北地区运用，冬季防寒成为影响安全的重要问题。

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It is an efficacious method that inferior brand diesel oil is used on locomotive diesel engine in cold weather to economize energy sources and increase economic benefit.

寒冷气候条件下机车柴油机使用低标号柴油是铁路节能降耗、提高经济效益的有效途径。

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