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Below are official contact information from www.heavydutydiag.com.
Official Website: www.heavydutydiag.com
Official Whatsapp: +8618259226905
Official email:heavydutydiag@outlook.com
Average response time is 2 hours between 8:00am-18pm GMT+8. If no answer received, please wait patiently or check your email’s spam folder.