因此，对于没有传真号码的人而言，就不需要定义传真的值，而对于有传真号码的人，则根据他们的意愿定义该值。
So the person without a fax number does not need to define a fax value, whereas the person with a fax number is free to do so as they please.
例如，一个人可能有传真号码，而另一个人没有。
For example, one person may have a fax number, while another may not.
这就像电话或者传真号码，我们不能没有。
It's just like a telephone or fax number which we cannot do without.
上海箭和机电设备安装工程有限公司已搬迁新址，电话和传真号码没有变更。
Shanghai KENHE Electrical Equipment Engineering Company has moved to a new location, but keep existing phone and fax number .
上海箭和机电设备安装工程有限公司已搬迁新址，电话和传真号码没有变更。
Shanghai KENHE Electrical Equipment Engineering Company has moved to a new location, but keep existing phone and fax number .
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