工芸基礎知識（選択問題）2018019

2018-01-19View Original

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往復ポンプのポンプバルブの比負荷とは、単位面積あたりのバルブディスク上の値をpgで表し、水頭に換算したものを指す。 A. バルブとスプリングの重力 B. バルブスプリングの張力 C. バルブ抵抗 D. A+B

Reply #22018-01-20

バルブとスプリングの重力＋バルブスプリングの張力

Reply #32018-01-20

D～！~~~~~~~~~~~

Reply #42018-01-20

Dバルブとばねの重力、バルブばねの張力

Reply #52018-01-20

選び方がわからないなら。私はDを選びます

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工芸基礎知識（選択問題）2018019

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