NF X 10-702-1:1994 Fire test methods-Determination of the opacity of the fumes in an atmosphere without air renewal-Part 1: Description of the testing device and method for control and adjustment of testing device. NF X 10-702-1:1994 火的试验法.在空气不更新环境下烟的暗度测定.第1部分:试验设备的控制和调节用试验设备控制和调节方法的说明.