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Patented invention

Hydraulic pressure testing device for high pressure resistant oil and gas pipeline

Hydraulic pressure testing device for high pressure resistant oil and gas pipeline

A kind of CNC machine tool speed holding device

A kind of CNC machine tool speed holding device

Double-roller crusher

Double-roller crusher

A New Type of Chemical Experiment Table

A New Type of Chemical Experiment Table

Rotary belt type dust collector

Rotary belt type dust collector

Chip rolling device for machine tool

Chip rolling device for machine tool

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