| http://www.w3.org/ns/prov#value | - t that mail delivery vehicles have difficulty in approaching close enough to the mail receptacle for the delivery or pickup of mail; 4. they are difficult to install adequately on posts or other supports; 5. their doors have been poorly designed so as to be difficult to open and close, or to inadequately prevent moisture from entering the mail receptacle; 6. they have been complicated in construct
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