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Refuse treatment drum screen device
The utility model is a garbage sorting device of a garbage disposal device, in particular to a garbage disposal rotary screen which comprises a rotary screen, a support table, a hopper, a catchExpand
Multiple-hole group type nozzle for deep penetration hydraulic windowmaker
The utility model relates to a nozzle for a deep penetration hydraulic perforator for oil wells. A front-cutoff conical surface with a conical tip angle of 90 DEG is arranged on the periphery of aExpand
High altitude slow descending device
The present invention discloses a high slow down means comprises a housing and a rope inside said housing comprises a bobbin, and the friction clutch plate; mounted outside the housing with one orExpand
Method of regulating bearing pretightening force using heat characteristics of metal material and its device
The inventive method consists in: modeling for thermal analysis of heating and temperature rise of the main shaft, using a cylindrical-coordinate system for the temperature distribution of theExpand