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1.A regional toll call requires that the user to dial "1" plus an area code before dialing the 7-digit telephone number.
用户拨打长途须在区号前加拨数字“1”，然后输入7位电话号码。收藏指正
2.Strowger system introduced in Australia and New Zealand. Development of key-type impulse sender, and Simplex dialing on toll lines.
澳大利亚和新西兰引进史端乔系统。开发键式脉冲发送器和长途电话线单工拨号。收藏指正
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