介绍城市煤气输配系统置换方式的选择、置换参数的确定、置换工艺流程及指标的控制，说明直接置换方式的可靠性。
The article introduces choices of direct purge on gas transmission system displacement method, determination of purge criteria, its technological process and control, then its reliability.
在迭代算法中，采用直接数据置换降低矩阵维数，节省了存储空间，提高了运算速度。
The iterative algorithms in C language were given, which used direct data replacement to reduce the dimension of matrix and saved the storage space.
第一与第二区域通过固态焊接既可直接地也可间接地结合，以形成整体的流体传导置换部件。
The first and second regions are either directly or indirectly joined by solid state welding to form a unitary fluid conducting replacement part.
应用推荐