For all of the success of German firms in exporting goods, some German Banks made the mistake of buying American mortgage debts.
虽然德国企业在出口工业品上取得巨大成功，一些德国银行却错误地购买了美国的抵押债权。
2
The mortgage contract signed by Company A and B is valid, but the statement that if Company B couldn't pay for the goods, the machine tools belonged to Company A is invalid.
As the right of guaranteed goods that justified the exchange value of the subject matter, mortgage right certainly has the characteristic of subrogation.