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...mb|Mk 37 Director c1944 with Mk 12 (rectangular antenna) and Mk 22 "orange peel"]] ...were) and the analogue computer in the heart of the ship. In the director tower, operators trained their telescopes on the target; one telescope measured e

...ater. When cracking a mixture of ethane and propane, only one water quench tower is required.<ref name=Keystone>{{Cite book | last=Kniel | first=Ludwig | au ...goes to the demethanizer tower. The overhead stream from the demethanizer tower consists of all the hydrogen and methane that was in the cracked gas stream