| http://www.w3.org/ns/prov#value | - The embodiment shown on FIG. 4 mainly differs from that shown on FIG. 2 by the addition of a cryogenic precooling heat exchanger 84 for the relatively dry natural gas to be liquefied, which heat exchanger is inserted in the gas supply pipe-line 7 before the cryogenic gas-cooling heat exchanger 5.
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