A. N. s. I. standard b2.4-this standard controls NIBCO hose coupling screw threads.
标准B2.4 -这个标准控制美国尼必可软管连接螺丝螺纹。
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A. N. S. I. Standard b16.1-covers cast iron pipe flanges and flanged fittings (Class 125 and 250).
标准B16.1 -包括铸铁管道法兰和法兰连接件(125磅级和250磅级)。
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In December 2008, for example, 1.2 million Los Angeles citizens thought that the entire Web had gone offline, because of a crashed Time Warner D. N. S. computer.