Zheng Mei

Low-power coal mine safety blaster

Coal mine hole sealing agent and preparation and use method thereof

Public place or ground transportation instrument emergency are fleed and are rescued brokenly glass system

Ground transportation instrument goes out and fires datonation -inhibition emergent rescue system of dealing with and flee

On -vehicle fire -retardant datonation -inhibition device

A fire -retardant datonation -inhibition system of early warning for public place and production environment

Vehicle-mounted flame-retardant explosion suppression device

Mining multifunctional safety production online detection monitoring substation

Borehole stress meter of hydraulic force transmission type

Hydraulic force transfer type borehole stressmeter and operation method thereof