① All work can only be performed when the machine is stopped.

② If the device is stopped, turn off the main gate and lock it with a padlock.

③ Because the transported materials are harmful to health, the device should be washed before working. ④ When washing (especially with a hose or high-pressure faucet), wear waterproof work clothes, rubber shoes and gloves, and use protective masks to avoid contact with waste water, feces and other dirt.

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