1 mobile block machine, the concrete mixer should be placed on a reliable plain place according to the construction drawing, not allowed to replace the support with the tyres. Unloaded the tires and keep it.A booth fortification rain or insulation protection should be set insulating work station, with a stent or leg tube frame, roof material should be anti-smashing.

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2 tunnel engineering, check the clutch ,brake, protective devices, wire rope track, pulley.These devices should be good before starting.

3, the operation personnel should have operating license, after startup planetary concrete mixer supplier, concentration;Hold position, shall not be absent without leave;Mechanical work, shall not be within the drum with grilled tool material to prevent injury.

4, While the hopper is lifting, it is forbidden to walk under the it, hopper pit need to be cleaned up, have to hang up insurance chain again and then begin cleaning.

5, Before JS500 concrete mixer is repaired and cleaned up the drum paste content, must cut off power supply, hang the "no closing" sign on the switch box, have a specialist nurse to avoid accidents.