global	apu_initialize
	global	call_sound0,call_sound1
 	global	clear_sound
	global	engine_sound

	global	call_skidend
	global	call_skid01,call_skid02
	global	call_skid03,call_skid04

	global	dart_on,dart_off
	global	brake_on,brake_off

	global	nomal_engine_call
	global	core_engine_call
	global	tunnel_engine_call