experimental benches can be divided into three types: double-sided island type, peninsula type and single-sided wall type. The island type allows people to move around freely and has a large traffic area, which facilitates safe evacuation. An appropriate safety distance should be left between tables, usually no less than 130 cm. However, if specific configurations (such as gas storage cylinders, etc.) are required in front of the stage, there should be a clear distance of 160— and 180cm between stages. Since adjacent operators operate the “ back-to-back, a separation screen can be added in the middle of the channel when necessary. It is made of flame-retardant material to prevent chemicals from injuring operators on the opposite side. At this time, the distance between stages should be appropriately increased.

        The safe distance between the test bench and the fume hood should generally be no less than 125 cm. As for the single-sided experimental bench against the wall, it should also meet the above spacing requirements.