Especially because tires are classified as materiel for the defense industry, once there is a dependence on imports this has an inevitable affect on military strength, thus in other countries the tire industry is protected.
尤其輪胎是國防工業的軍需品，一旦依賴進口，軍力勢必受影響，因此在國外都是被列為國家重要保護產業的。