安全质量体系运转机制在乌鲁木齐铁路局已实施两年多，全局安全周期延长。
The Urumchi Railway Administration has carried out the running mechanism of safety quality system for more than 2 years. And the safety period of the Administration is prolonged.
安全质量体系运转机制在乌鲁木齐铁路局已实施两年多，全局安全周期延长。
The Urumchi Railway Administration has carried out the running mechanism of safety quality system for more than 2 years. And the safety period of the Administration is prolonged.
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