Today, modern bookbinding is divided between hand binding by individual craftsmen working in a one room studio shop and commercial bindings mass-produced by high speed machines in a production line factory.oday, modern bookbinding is divided between hand binding by individual craftsmen working in a one room studio shop and commercial bindings mass-produced by high speed machines in a production line factory.
The Ebers Papyrus, also known as Papyrus Ebers, is an Egyptian medical papyrus of herbal knowledge dating to c. 1550 BC.he papyrus was written in about 1500 BC, but it is believed to have been copied from earlier texts. The Ebers Papyrus is a 110-page scroll, which is about 20 meters long.
EGR valve on top of the inlet manifold of a Saab H engine in a 1987 Saab 90. In internal combustion engines, exhaust gas recirculation (EGR) is a nitrogen oxide (NOx) emissions reduction technique used in petrol/gasoline and diesel engines.EGR works by recirculating a portion of an engine's exhaust gas back to the engine cylinders.GR valve on top of the inlet manifold of a Saab H engine in a 1987 Saab 90. In internal combustion engines, exhaust gas recirculation (EGR) is a nitrogen oxide (NOx) emissions reduction technique used in petrol/gasoline and diesel engines.