１９９６年初购入并投入使用的两台小松Ｄ３７５Ａ－３型推土机，主要承担西安市重点工程一－黑河枢纽工程的坝肩削坡和基坑开挖中全部爆破石的堆方任务，以及坝壳填筑砂卵石的平整工作。推土机的履带磨损较快，工作４５００ｈ后，履带板齿条（简称履齿，下同）和履带销套（简 The two Komatsu D375A-3 bulldozers purchased and put into use at the beginning of 1996 are mainly responsible for the task of stacking all the blasting stones in the apron cutting and foundation pit excavation of the key project of Xi’an City - Heihe Project, and the dam shells. Fill in the smooth work of sand and pebbles. Bulldozer track wear faster, after 4500 hours of work, track plate rack (referred to as teeth, the same below) and track pin set (Jane