Valvae Electio Techniques
Valvae selectae artes 1, valvae perscriptio (valvae aetv One-modo): generaliter applicatur ad media pura, non ad solida continenda particulas et viscositatem medii. 2, secundum valvam depressam pro DN50mm (aetv One-via valvae) :, uti butyro...
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