At common law a deed was an instrument under seal that contained a covenant or contract delivered by the individual who was to be bound by it to the party to whom it was granted .

契约，是一种特别的 合约，须要经过当事人签署、盖章并送交对方才算有效，契约上的 盖章在法律上被视为一种有效的约因。

An agreement or promise made orally or in writing not under seal ; a contract . Protocol specified not supported . Set the protocol as the default one & Name Pipes .

协定口头或书面 未 经 盖印的协议或许诺； 协定所指定协议不受支持。将该协议设置为默认协议&命名管道。