盖销邮票 meaning in English

used sets

Serviced souvenir cover affixed with the hong kong 2001 stamp exhibition stamp sheetlet series no . 7 and cancelled with the special postmark ( will be sold at 38 philatelic offices only )
贴有已盖销邮票小型张系列第七号的纪念封(只在38间集邮局有售)
Serviced souvenir cover affixed with the hong kong 2001 stamp exhibition stamp sheetlet series no . 5 and cancelled with the special postmark ( will be sold at 38 philatelic offices only )
贴有已盖销邮票小型张系列第五号的纪念封(只在38间集邮局有售)
Serviced souvenir cover affixed with the hong kong 2001 stamp exhibition stamp sheetlet series no . 6 and cancelled with the special postmark ( will be sold at 38 philatelic offices only )
贴有已盖销邮票小型张系列第六号的纪念封(只在38间集邮局有售)
Serviced souvenir cover affixed with the hong kong 2001 stamp exhibition stamp sheetlet series no . 8 and cancelled with the special postmark ( will be sold at 38 philatelic offices only )
贴有已盖销邮票小型张系列第八号的纪念封(只在38间集邮局有售)
Serviced souvenir cover at $ 8 . 50 each affixed with a stamp sheetlet and cancelled with the special postmark will be available at the 38 philatelic offices on 21 april 2001
贴有已盖销邮票小型张并盖上特别邮戳的纪念封将于四月二十一日起在三十八间集邮局发售，每个售价八元五角。