In 1983, KZL4-13 drill bar fire grate boiler designed and trail-manufactured by itself obtained national high quality product certificate.是什么意思_In 1983, KZL4-13 drill bar fire grate boiler designed and trail-manufactured by itself obtained national high quality product certificate.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句