Table: locomotives_china
Columns: model
build_year
top_speed_in_operation_km_h
power_output_kw
builder_family
total_production

Question: What is the power output (kw) of model hxd2b?
SQL: SELECT "power_output_kw" FROM locomotives_china WHERE "model" = 'hxd2b'

Question: What model has a builder of zhuzhou, and a power output of 9600 (kw)?
SQL: SELECT "model" FROM locomotives_china WHERE "builder_family" = 'zhuzhou' AND "power_output_kw" = '9600'

Question: What is the power output (kw) of model hxd3d?
SQL: SELECT "power_output_kw" FROM locomotives_china WHERE "model" = 'hxd3d'

Question: What is the power output (kw) of builder zhuzhou, model hxd1d, with a total production of 2?
SQL: SELECT "power_output_kw" FROM locomotives_china WHERE "total_production" = '2' AND "builder_family" = 'zhuzhou' AND "model" = 'hxd1d'