
Symbolic Representation Of Pipework Components On Technical Drawings - Functional Representation - Examples For The Representation Of Open Or Shut-off Flow
出版:German Institute for Standardisation (Deutsches Institut für Normung)

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Symbolic Representation Of Pipework Components On Technical Drawings - Functional Representation - Examples For The Representation Of Open Or Shut-off Flow
出版:German Institute for Standardisation (Deutsches Institut für Normung)
专家解读视频