单词	硬煤无烟煤
释义	硬煤无烟煤hard coal
随便看	mandatory member mandatory membership class mandatory message element mandatory periodic verification mandatory pilotage mandatory pilotage{=compulsory pilotage} mandatory pilotage-- compulsory pilotage--compulsory pilot mandatory pool mandatory print labeling mandatory procedure mandatory protection mandatory renewable energy target mandatory renewable energy target {= mret} mandatory requirement mandatory retirement mandatory service mandatory set membership mandatory sign mandatory standard mandatory support level mandatory surface mandatory tolerance mandatory variable part mandatory verification man day