Free Improvement of the Methods of Estimating the Expected Frequency of Accidents at the Gas Pipelines Based on the Results of its Approbation in OOO Gazprom transgaz Yekaterinburg Bondin Yu.A., Bausov S.V., Ovcharov S.V. DOI: 10.24000/0409-2961-2018-9-31-38 Year: 2018 Issue num: 9 more