In the capital , residents stocked up on face masks and air purifiers .
在北京，市民们大量购买口罩和空气净化器。
Online expat discussion groups in beijing debate the merits of different air purifiers .
在北京的外国人在论坛上火热讨论着不同空气净化机的优劣。
They noted that it was not built to earthquake safety standards , and relied on water purifiers and other vulnerable equipment connected to the reactors by more than a mile and a half of rubber hoses .
