AS1288 and AS2208 require glass doors to be made from laminated, tempered or toughened glass. This heating process currently means that evacuated glazing cannot be toughened or heat-strengthened. Chemical strengthening results in a strengthening similar to toughened glass. The second method is used in toughened glass and pre-stressed concrete. During its manufacture, the glass is toughened by ion exchange. The receiver alloy was toughened by addition of nickel after Mark I production. Margins were standardized and regulations further toughened. All striking surfaces of his body are extremely toughened. If fibers have larger fracture strain than matrix, the composite is toughened by crack bridging. The silicon carbide material is toughened by this approach. Act of 2017 (CRIEEA) and further toughened the Sectoral Sanctions against Russia. In 1875, the Russians toughened their rule by imposing additional taxes. In fact, the aristocrats have toughened up admirably and are quite content with their lot. Metals can be toughened by improvement of processing. Gradually, the regimen toughened and they were forbidden to take walks.