多年来，航天发射场与军事导弹发射试验紧密相联，因此，一直处于绝密状态，鲜为人知。随着航天事业的国际化、商业化，航天发射场逐步向公众开放，甚至还邀请国外军政要人和航天同行前来参观，切磋技艺，交流经验，使多年保密的“禁区”解密了。下面介绍三个典型的著名航天发 Over the years, the space launch site has been closely linked with the launch of military missiles and has therefore been kept in the top-secret position for relatively unknown reasons. With the internationalization and commercialization of the aerospace industry, the space launch site gradually opened to the public and even invited foreign military and government officials and space counterparts to visit and learn from their skills and exchange experiences so that the forbidden zone, which has been kept for many years, was declassified. Here are three typical famous space hair