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the mission of our association is to promote . Many of our members are interested in the achievements your pany has made in .Enclosed is our preliminary schedule for the conference which will be reviewed in weeks. Ill call you to see who from your pany would be willing to speak to us. I can assure you that well make everything convenient to the speaker. Sincerely yours, 四、Dear sir/madam: We would like to invite you to an exclusive presentation of our new . The presentation will take place at , at 16