The upstream end of the fire test chamber shall be filled with a 14in.length of uncoated 16-guage steel plate positioned on the specimen mounting ledge in front of and under the leading edge of the specimen.是什么意思_The upstream end of the fire test chamber shall be filled with a 14in.length of uncoated 16-guage steel plate positioned on the specimen mounting ledge in front of and under the leading edge of the specimen.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句