欧美成人精品第一区_天天中文字幕av天天爽_97久久曰曰久久久_亚洲丝妺中文字幕av ,亚洲综合成人网在线观看/在线午夜影院/日本一二线不卡在线观看/狼人色综合

History of fiber cement siding

Thu,17 Jan 2019   15:27:15

 Early fiber cement panels used asbestos fibers to add strength. Ludwig Hatschek patented asbestos-reinforced fiber cement in Austria in 1901 and named it "Eternit", based on the Latin term "aeternitas", meaning everlasting. In 1903, Schweizerische Eternit-Werke AG began fabricating the material in the city of Niederurnen in Switzerland. Cellulose-reinforced fiber cement products were introduced 1980s as a safe replacement for the very widely-used asbestos cement products manufactured before that time.