rgin, but the certificate is not granted in suchcases. Moreover, a certificate granted for one quartercan be retained by the producer only dining the nextquarter. He must then return it to the consulting en-gineer. Then he receives a new certificate, if his recordwarrants it. When a producer is not… … Charts showing a comparison between the results obtained by the association as a whole during the periodshown above, and the requirements of the A. S. T.M. standard specification for malleable iron castings possible, that his product may be brought up to theproper quality. Such advisory work is…
Automobiles · Aeronautics
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![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer03inte-362-228.webp)
