kerb drill การใช้

• In 1971, the Green Cross Code was introduced to teach children safer crossing habits, replacing the earlier " kerb drill ".
• The Green Cross Code replaced the earlier Kerb Drill ( below ) pedestrian safety campaign; the Kerb Drill's military style ( " Halt!
• The Green Cross Code replaced the earlier Kerb Drill ( below ) pedestrian safety campaign; the Kerb Drill's military style ( " Halt!