Q29
In the order of the chronological development, the longwall support systems are arranged as P Powered support Q Link bar and friction support R Frame support S Hydraulic support
A.
P > Q > R > S
B.
R > S > Q > P
AnswerC.
S > R > P > Q
D.
Q > S > R > P
Answer: Option B
Solution
Answer: Option B
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