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What are the materials of bulletproof helmets?



Bulletproof helmets are made of high-quality bulletproof steel plate, bulletproof helmets are made of high-quality bulletproof steel plates by one-time stretching technology, high-quality bulletproof steel plates are used in one-time stretching technology to manufacture bulletproof helmets, high-quality bulletproof steel plates are used in one-time stretching technology to manufacture bulletproof helmets, and high-quality bulletproof steel plates are used in one-time stretching technology to manufacture bulletproof helmets. High quality bulletproof steel plate is used to manufacture bulletproof helmet by one-time stretch forming technology, high-quality bulletproof steel plate is used to manufacture bullet-proof helmet by one-time stretch forming technology, and high-quality bulletproof steel plate is used to manufacture bullet-proof helmet by one-time stretch forming technology. the bullet-proof helmet is manufactured by one-time stretch forming technology.