Table: china_locomotives
Columns: model
build_year
top_speed_in_operation_km_h
power_output_kw
total_production

Question: Tell me the build year for total production of 150
SQL: SELECT "build_year" FROM china_locomotives WHERE "total_production" = 150

Question: Tell me the power output for total production of 100
SQL: SELECT "power_output_kw" FROM china_locomotives WHERE "total_production" = 100