9Belyakov I I, Breus V I,Litvinova L A,et al. Causes of Damage to Bafflepipes in High-pressure Drum Boilers at the Ust'-ilimsk Heat and Electric Power Plan[ J]. Power Technology and Engineering, 2008,42 (6) : 344 348.
10Christian K H. Componem Lifetime Models B dcon Wei- bun Mixture and Competing Risks[J]. QuMity and Relia- bility Engineering, 1992,8:325 - 333.
