DIN EN ISO 23747-2015 麻醉和呼吸设备.自然呼吸的人肺部功能评估用最大呼气流量计(ISO 23747-2015),德文版本EN ISO 23747-2015
Anaesthetic and respiratory equipment - Peak expiratory flow meters for the assessment of pulmonary function in spontaneously breathing humans (ISO 23747:2015); German version EN ISO 23747:2015