Which of the following projects does Huaian South China Purification Co., Ltd. have?

Huaian South China Purification Co., Ltd. is an enterprise specializing in air purification, water treatment, noise control and other fields. Its main projects include:

1. air purification project: including clean room, air purification equipment, fresh air system, air filter, etc.

2. Water treatment projects: including water treatment equipment, sewage treatment equipment, reverse osmosis equipment and ultrafiltration equipment.

3. Noise control items: including noise control items, noise isolation items and noise testing.

4. Medical equipment: including operating room purification equipment and air purifier.

5. The above are the main projects of Huai 'an South China Purification Co., Ltd., which also provides customized engineering design and construction services, and can carry out personalized scheme design and implementation according to customers' needs.