许多农机零部件上打印了各种号码，它们有着特定的含义，在采购时应仔细看清楚，在维修作业中，必须按有关要求进行装配。 一、活塞：铝活塞顶面上一般打印有 0. 00、 0. 25等字样，前者表示标准活塞，后者表示直径加大 0. 25毫米活塞，它必须与内径镗大 0. 25毫米的气缸套配用 Many agricultural machinery parts and components printed on a variety of numbers, they have a specific meaning, the procurement should be carefully read, in maintenance operations, must be assembled according to the requirements. First, the piston: the top of the general aluminum piston print 0. 00, 0. 25 and other words, the former said the standard piston, the latter said the diameter increased 0. 25 mm piston, which must be large diameter bore 0. 25 mm Cylinder liner with