Goods Pingvin78

Task 20 A concrete dam has

 3
$0.65

Task 20a

$0.65

Task 21 On a pipeline of constant cross-section

 2
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Task 21a

$0.95

Task 22 Calculate the pressure loss

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Task 22v

$0.97

Task 23 Determine the flow rate when feeding

 1
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Task 23a

$0.97

Task 24 Determine the strength and position

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Task 24a

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