Packing Protocol: When Cartons Carry Contractual Weight
装箱规范：纸箱承载的合同分量
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Carton drop-test specifications (e.g., '1.2m onto concrete, 5 corners') aren’t arbitrary—they map directly to e-commerce last-mile carrier handling standards.
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Inner packaging material composition must align with destination-country recycling mandates, not just structural protection requirements.
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