What was the Grid with a hydraulics time/required?
CREATE TABLE table_name_57 (grid VARCHAR, time_retired VARCHAR)
SELECT grid FROM table_name_57 WHERE time_retired = "hydraulics"
### Context: CREATE TABLE table_name_57 (grid VARCHAR, time_retired VARCHAR) ### Question: What was the Grid with a hydraulics time/required? ### Answer: SELECT grid FROM table_name_57 WHERE time_retired = "hydraulics"