Engineering Progress

Engineering Progress

4.11 - 1251 ratings - Source

The valve-seat rings consist of cast stsel, and reliable guiding is essentia! for ensuring both leak-proofnes3 and easy motion. The loads are ... Mechanical power is the only kind entering into consideration as driving power for water-way locks. Manual drive is, however, to be recommended as a handy emergency stand-by in case the motors should suddenly happen to break down. Frequently the poweranbsp;...

Title:Engineering Progress
Publisher: - 1921


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