译：MT 320-1993 The method for coal core sample selectivity test

译：MT 326-1993 U-shaped steel retractable roadway support bracket fastener

译：MT 334-1993 The General Technical Conditions for Explosion-proof Special Type Power Supply Device of Lead-acid Battery in Coal Mines

译：MT 331-1993 JL Series Large-scale Multi-cable Bucket for Open-pit Shaft Basic Parameters

译：MT 324-1993 Double-pillar parallel hydraulic top-cutting props

译：MT 332-1993 XL series basic parameters of large-scale multi-rope bucket dump unloading equipment for vertical wells

译：MT 328-1993 JC series standoff shaft large multi-rope coal briquetting machine parameters

译：MT 333-1993 The method for preparing the model number of coal mining locomotive products and the management method are as follows: Model number preparation: The model number of coal mining locomotive products is composed of the type code, the series code, the model code and the optional part code. The type code, series code and optional part code are determined by the manufacturer, while the model code is determined by the classification standard of the product. Management method: The management of coal mining locomotive products should be carried out in accordance with relevant national and

译：MT 329-1993 JC series main well large multi-cable scoop basket basic parameters

译：MT 327-1993 heavenly wheel