词汇	oxy-welding
释义	oxy-welding un.乙炔焊接；🌏气焊
随便看	optional sigma-fields optional sign optional signed constant optional singulary transformation optional sleep optional snacks optional solution optional sports teaching optional stipulation optional stop optionalstop instruction optional stop instruction optional-stop instruction optional stop order optional stowage clause optional string optional studies optional subject optional subjects optional subjects at school optional subscription-time selectable service Optional subs cription-time selectable service optional succession optional suppression optional surcharge