习近平总书记要求，要认真汲取教训，注重举一反三，全面加强安全生产什么工作？

413 If either of these devices is installed explain whether it is required equipment.

412 Head aircraft into the wind.

411 Explain how to use seat belts and shoulder harnesses.

410 Each electrical system has a code to identify it.

409 Distances shown are based on zero wind

408 Comments are located directly below the repair/modification section,extending from the left to the right margins.

407 Bleed the system before you disconnect the components

406 All personnel must fully know the safety precautions

405 Add solvent to make the paint more liquid

404 “Decrease” is better because it describes the pressure,not the indicator that monitors the pressure.