推荐回答（1个）
有管网七氟丙烷灭火系统钢瓶在钢瓶间。因为距离远，所以要求压力高，一般4.2MPa。有的是5.6MPa。 无管网七氟丙烷灭火系统钢瓶在防护区。因为在防护区，所以压力不能太高，所以一般选2.5MPa。
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