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2.A/A = Pneumatic Air to Air. A/SR = Pneumatic Air to Spring Return (fail-safe). E = Electric (motor driven).
4.According to the schedule, the project will start working since 2001, and transmit gas to Shanghai in 2002, and complete the whole pipeline in 2004.
9.a drive with its own power supply and fan mounted outside the computer system enclosure and connected to the computer by a cable.
10.α-CDA was obtained with molecular chlorine and dodecanoic acid and the gas/liquid reactionwas carried out on 1 kg of dodecanoic acid scale.


