Key;
Lab;
of;
Health;
Maintenance;
for;
Mechanical;
Equipment;
of;
Hunan;
Province,;
Hunan;
University;
of;
Science;
and;
Technology,;
Xiangtan,;
Hunan;
411201,;
China;
Department;
of;
Mechanical;
Engineering,;
Univ./Ottawa,;
161;
Louis;
Pasteur,;
Ottawa,;
ON;
CA;
K1B;
6N5;
Xiangtan;
Liangchuan;
Coal;
Mine;
Machine;
Co.;
Ltd.;
,;
Xiangtan,;
Hunan;
411104,;
China;