Plug valve gland types include:
1. Single gland
2. Double gland
3. Button gland
4. Bolted gland
5. Piston gland
6. Screwed gland
a) 1, 3, 4, 6
b) 1, 4, 6
c) 1, 2, 4, 6
d) 1, 3, 4, 5
e) 2, 4, 5, 6
Answer: B
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3A2 Pan Global
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