市场上常见的电子表,有指针式(以下简称指针表)和数字显示式(简称数显表,又称液晶手表)。各种电子表均采用石英晶体作振荡定时元件,用扣式电池作动力源。其优点是:(一)计时精度高:日误差最大几秒;(二)使用方便,无需上发条。一、指针表的选购1.壳体表面应光洁、无划痕、无斑点、镀层无脱落。双针 Common electronic watches on the market, pointer (hereinafter referred to as the pointer table) and digital display (referred to as digital display, also known as LCD watches). All kinds of electronic watches are made of quartz crystal oscillating timing components, with button batteries for power source. The advantages are: (A) high timing accuracy: the maximum error of a few seconds; (B) easy to use, no winding. A pointer table to buy 1 shell surface should be smooth, no scratches, no spots, no coating off. Double needle