邮电部门规定．每重20克以内的平信，寄本埠邮资为1角，外埠为2角，超过20克，则按倍数加贴邮票．这里介绍一种简单的估重方法：一个普通标准信封重6克．一张普通信纸重1．6克，一张电开小报纸重12克，一张5英寸彩照重3克。这样，不超重的信件限度是：一个信封加8张信纸；一个 Posts and Telecommunications Department regulations. Weighing less than 20 grams per pound, post the port postage for the 1 corner, 2 for the other port, more than 20 grams, then multiplied affixed stamps. Here is a simple way to estimate: a standard standard envelope weighing 6 grams. An ordinary stationery weighs 1.6 grams, an electric open newspaper weighs 12 grams, a 5-inch color-weight 3 grams. In this way, letter limits that are not overweight are: one envelope plus 8 sheets of stationery; one