Parent-level security control: ▸ thickened aviation aluminum alloy rod body (wall thickness 2.0mm), bearing 80kg, single-hand towing twin-child car **One-button emergency stop brake handle (response speed <0.3 seconds) + anti-mistouch lock design Child friendly protection: Food grade silicone fully wrapped grip (antibacterial rate 99.7%) ▸ 360 ° anti-pinch hand rotating joint (passed EN71-1 Toy Safety Certification)

Stage-level earthquake resistance: -Third-Order spring damping structure, absorbing equipment vibration (passing MIL-STD-810G impact test) -Aviation aluminum rod body + nylon glass fiber wheel frame, 40% weight loss, still bearing 300kg Silent black technology: -Polyurethane muffler wheel (noise <25dB) + dust-proof design of fully wrapped bearing -Grip built-in anti-skid silicone layer (grip strength increased by 200% in sweat-wet environment) Fast field distribution system: -One-button angle locking (0 °/15 °/30 ° three-gear adjustment adapter...