Hebei Comet Regulators Co., Ltd. Was the first as well as the only manufacturer of combustible gas regulators designated by the National Machinery Ministry.是什么意思_Hebei Comet Regulators Co., Ltd. Was the first as well as the only manufacturer of combustible gas regulators designated by the National Machinery Ministry.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句