Research on metal - plating on diamond surface in a vacuum salt - bath 金刚石表面真空盐浴镀覆金属的试验研究
2.
Flanges and their joints - gaskets for class - designated flanges - covered metal jacketed gaskets for use with steel flanges 法兰及其接头.分级标示法兰用垫圈.钢法兰用涂覆金属的套层垫圈
3.
Flanges and their joints - dimensions of gaskets for pn - designated flanges - covered metal jacketed gaskets for use with steel flanges 法兰及其连接件. pn标示法兰用垫圈的尺寸.钢法兰用涂覆金属的套层垫圈