principle of voluntary participation meaning in English

自愿互利原则

Article 4 transactions between business operators and consumers shall be conducted according to the principles of voluntary participation , equality , fairness , honesty and trustworthiness
第四条经营者与消费者进行交易，应当遵循自愿、平等、公平、诚实信用的原则。
To meet the needs of the armed forces and on the principle of voluntary participation , male and female citizens who have not yet reached 18 years of age by december 31 of a certain year may be enlisted for active service
根据军队需要和自愿的原则，可以征集当年十二月三十一日以前未满十八岁的男女公民服现役。
Shanghai die & mould trade association ( sdmta ) is a trade organization formed by die and mould industries in shanghai , and related local enterprises , institutes , colleges and universities , and mass organization , based on the principles of voluntary participation
上海市模具行业协会(原名：上海市模具工业协会)是本市模具行业及相关企业、事业单位、院校及社会团体按自愿原则组成的行业组织。