Q450
Ventilation door must be arranged to close automatically and with this object frame of the door is so fitted that the top leans about forward in the direction of air pressure.
A.
0 - 25 mm
B.
25 - 50 mm
C.
50 - 75 mm
AnswerD.
75 - 100 mm
Answer: Option C
Solution
Answer: Option C
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