一个类中内嵌两个结构体

class AP_Vehicle {
public:
/*
common parameters for fixed wing aircraft
*/
struct FixedWing {
AP_Int8 throttle_min;
AP_Int8 throttle_max;

AP_Int8 throttle_slewrate;
AP_Int8 throttle_cruise;
AP_Int16 airspeed_min;
AP_Int16 airspeed_max;
AP_Int16 pitch_limit_max_cd;
AP_Int16 pitch_limit_min_cd;

AP_Int8 autotune_level;
AP_Int16 land_pitch_cd;
};
/*
common parameters for multicopters
*/
struct MultiCopter {

AP_Int16 angle_max;

};
};
一个类中内嵌两个结构体，
static AP_Vehicle::MultiCopter aparm; //这个静态函数用来定义
这里的定义意思应该是aparm函数继承了MultiCopter的属性。
这样理解对吗？