Dimensions of electronic tubes and valves - IEC dimensionsWhat is BS 448 1 Dimensions of Electronic tubes and valves about? BS 448 1 is the first part of a multi series standard used for dimensions of electronic tubes and valves that specifies the rules and drawings of these electronic tubes and valves. This helps in designing and manufacturing good quality electronic tubes and valves. BS 448 1 gives recommended practice for the preparation of drawings for inclusion in this Publication. Who is BS 448 1

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