| http://www.w3.org/ns/prov#value | - 3331325198Other oil and gas field production machinery and tools (except pumps)3331325199Other oil and gas field production machinery and tools, except pumps 33313252Parts for oil and gas field production machinery and tools, sold separately (excluding parts for portable drilling rigs and other driling equipment)333132522Rotary wheel-mounted drilling and well-servicing rigs3331325256Parts for oil
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