What does online lep mean?

Leo, one of the southern constellations, was defined by Ptolemy, an ancient Greek astronomer in the 2nd century A.D. It looks like the word "work" and is imagined as a running rabbit. Latitude varies from+63 to 90, which can be seen completely.

2.lep refers to indoor environmental health and safety and outdoor environmental health and safety.

Related information:

Since 1970s, the science of environmental safety has been in the initial stage in China. During this period, books such as "Some Understanding of Safe Production in China" published by China Environmental Science Press defined and summarized the environmental safety involved in indoor industry and family.

In 1980s, China began to standardize and systematically define all dimensions of environmental science data.

At the beginning of the 20th century, the field of environmental safety started and developed in China. In addition to waste gas, waste water and industrial pollution, people began to pay attention to environmental safety issues that often affect people's lives and health.

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