Usage : this is kind of automatic carry and digit forward counter by mechanic pulls . it is generally applied to punches and printers for number counting 用途：本品是一种机械带动自动进位，递加计数器，适用于一般冲床，印刷机等机械作计数应用。
2.
Usage : this is a kind of automatic carry and digit - forward counter by mechanic pulls . it is generally applied to machine tools for number counting . it can bear big shocks without influence on correct counting 用途：本品是一种机械带动自动进位，递加计数器，适用于一般机床的操作计数，能承受较大震动而不影响正确计数。
