方法：用真空负压表、延迟控制线路，接通电话机免提键、存储拨号键。
Methods The vacuum negative pressure meter and the delayed control line were used.
相比之下，现在我只是从通讯录中选择这个人的名字，然后就按下拨号键。
By contrast, now I just select the person's name from my address book and press "call."
如果你有手机，确信快速拨号键里存着紧急求救号码，即使遇到了危险，你也能够很快的紧急求救；
If you have a cell phone then make sure that your emergency numbers have been stored in your speed dial section.
如果你有手机，确信快速拨号键里存着紧急求救号码，即使遇到了危险，你也能够很快的紧急求救；
If you have a cell phone then make sure that your emergency numbers have been stored in your speed dial section.
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