There are many insects inside the factory, and caterpillar in the leaf because the worker not clean the leaf before

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They don't have automatic curtain, so they do it manually

They cant protect tea the leaves at night and they keep the lights out

They don't have proper tool so they count it by experience

They don't have some tools and so they have to check the temperature manually.

The machine is hot and dangerous because the process needs heat and must rotate.

The worker feels difficulty to move leaves because the door of machine is small.

The machine cannot be optimal.

There is a hazard of gas leaking because the valve is not tight.