In recent years, as people’s awareness of ecological and environmental protection has increased year by year, the environmental protection situation has become increasingly severe. The livestock and poultry bre…

HEPA (High-Efficiency Particulate Air) is a foreign name. There are many kinds of materials for HEPA filters, which can be divided into PP (polypropylene) filter paper, PET filter paper, PP and PET composite fi…

As a wireless communication tool, walkie-talkies are widely used in many places due to their economical use and low operating costs. However, many people encounter parts when using walkie-talkies. If moisture a…

Organic fertilizers are generally formed through stacking and fermentation. Summer is a good time to make organic fertilizer. Taking advantage of the high temperature conditions in summer, organic waste such as…

Indoor air quality is increasingly important to people’s health and work efficiency. In fact, indoor air is not guaranteed to be clean because there are many pollutants surrounding us. Air pollution is very har…

The application of walkie-talkies ranges from communication in an event organization to construction, railway construction, etc. Walkie-talkies are a good command and intercom communication device for people wo…

We know that air purifiers can remove particulate matter in the air at a high level, and at the same time, they can also solve the problem of indoor volatile organic compound air pollution caused by decoration …

There are four common organic fertilizer fermentation methods: tank fermentation, stack fermentation, high-temperature sealed fermentation tank and Nano compost film covering fermentation. Trough fermentation r…

Hearing aids are good news for the hearing-impaired and are mostly used by the elderly. The principle of its use is to use a small amplifier to amplify the originally inaudible sounds and reuse them. The residu…