(PECL pecl_http >= 0.10.0)
HttpResponse::getThrottleDelay — throttle delay ､霹ﾀ､ｹ､�
ｸｽｺﾟ､ﾎ throttle delay ､霹ﾀ､ｷ､ﾞ､ｹ｡｣
ﾉﾃﾃｱｰﾌ､ﾎ throttle delay ､ｽ､ｹ double ﾃﾍ､ﾖ､ｷ､ﾞ､ｹ｡｣