The cardiopulmonary resuscitator installed with this kind of teeth is reliable in action and is conveniently for switching into a breathing machine for first aid.

安装了这种齿的心肺复苏机，其动作十分可靠。而且，还可方便地切换成急救呼吸机。

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Sreedhara says that when he left India in 1987, he had never even seen a cardiopulmonary bypass machine or a ventilator.

NPR: India's Doctors Returning Home