Looking for maker who can supply high quality of carbon steel and stainless steel butt welding fitting per ansi standard 我们正在寻找可以提供高品质铅钢和不锈钢焊接设备的供应商
We have purchased and installed testing equipment in our testing room to meet ansi standards . we are also carrying through the iso9001 : 2000 quality management system requirements and will get the approval soon 在生产自动化方面我们不惜投入,拥有世界先进水平的精密型盐水喷雾试验机锁具耐用度测试仪表面粗糙度测试仪等检测设备,可按美国ansi检测标准检测。
The elliptic curve digital signature algorithm ( ecdsa ) is the elliptic curve analogue of the digital signature algorithm ( dsa ) . it was accepted in 1999 as an ansi standard , and was accepted in 2000 as ieee and nist standards . unlike the ordinary discrete logarithm problem and the integer factorization problem , no subexponential - time is known for the elliptic curve discrete logarithm problem . for this reason , the strength - per - key - bit is substantially greater in an algorithm that uses elliptic curves 椭圆曲线数字签名算法( ecdsa )是数字签名算法( dsa )的椭圆曲线对等。它先后成为ansi , ieee , nist和iso的标准,而且其它的一些组织正在考虑成为其标准。不象普通的离散对数问题和因数分解问题,椭圆曲线离散对数问题没有已知的亚指数算法,所以使用椭圆曲线的算法在密钥的位强度是足够高的。