They also describe maintenance techniques such as thermography.
他们还描述了维修技术，如热。
Prelindnary study on maintenance planning techniques such as repair, replacement etc. were also made.
并对检修、更换等维修规划技术进行了初步研究。
Prelindnary study on maintenance planning techniques such as repair, replacement etc. were also made.
并对检修、更换等维修规划技术进行了初步研究。
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