First, the extinguisher valve is removed and the threads and interior of the cylinder are checked for corrosion, pitting, and any other abnormalities. [29 CFR 1910.157(f)(3)] If the cylinder passes the visual inspection, it is placed into a steel chamber, which is then filled with water at normal pressure.
Updated April 17, 2017. The earliest dated printed book known is the Diamond Sutra, printed in China in 868 CE. However, it is suspected that book printing may have occurred long before this date. In 1041, movable clay type was first invented in China.
There were NO PRINTED BIBLES before Gutenberg. The FIRST printed Bible was an edition of the Latin Vulgate, by that time, NOT a vernacular language regardless of its name. The first complete English (technically considered Middle English) Bible was the translation finished in the 1380's by Wycliffe and his co-workers.