按约定 by convention ; by appointment ; AS ARRANGED

按照约定 by appointment ; as agreed ; [科技] as Arranged

按契约设计 design by contract

按合约索偿 contractual claim

续按揭契约 further charge memorial

按合约方式 on contract ; on agreement

租期按月计的租约 monthly tenancy

按契约而持有业权 leasehold

按约救助 salvage by contract

按揭条件违约保证 mortgage default guarantee