semi-open circuit scuba diving半: half开口: open one's mouth; start to t ...回路: return circuit; return; loop ...配套: form a complete set; assort; ...水下呼吸器: underwater breathing apparat ...下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:半开口回路配套水下呼吸器潜水，即可在微信中查询翻译
