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TCU control valve, hot oil line.

Thermal cracking unit construction. No7 Batt TPS and No26 Batt SPS in background.

Dismantling No2 SPS for thermal cracking unit construction. No2 cont and No3 cont in background.

Dismantling No2 SPS for thermal cracking unit construction. No2 cont and No3 cont in background.

Dismantling No2 SPS for thermal cracking unit construction. No2 cont and No3 cont in background.

Thermal cracking unit from top of steam stills - No3 Batt SPS, No4 Batt SPS, No6 Batt TPS, #7 Batt TPS in background lead chamber acid plant in distance on view 1.

Thermal cracking unit from top of steam stills - No3 Batt SPS, No4 Batt SPS, No6 Batt TPS, #7 Batt TPS in background lead chamber acid plant in distance on view 1.

Operator working on FCM fractionator relief valves.

Operator working on FCM fractionator relief valves.

Dinwoody Plate 87

Painted pictographs in Dinwoody Cave. Made with white chalk. Representing three circles with lines thru them. They may represent an Indian game.