BICO A PROVA DE GOTEJAMENTO PARA APARELHOS DE FAZER VACUO
摘要
<p>1299070 Valves W R GRACE & CO 1 July 1970 [25 July 1969] 4315/71 Divided out of 1299068 Heading F2V The description is similar to that of Specification 1,299,068 but the claims are directed to the construction of nozzle (82).</p>