In the meantime, new generation of optical disks announced by Sony and Panasonic17 based on low Young’s modulus polymers (~50 MPa18) have increased the lifespan from 20 years to 50 years.
…………………………………………………………………………………………………………. यो मुलुक सिंगापुर जस्तो बनिसकेको छैन मात्र राजनीतिक परिवर्तन...