1一则案例引出的问题甲为某混凝土公司的下属搅拌站,乙为某建筑公司第五项目部经理。甲、乙双方签订了一份混凝土买卖合同。双方约定:甲向乙所负责的某建筑公司的施工工地供应混凝土,该合同上除乙签字外,还加盖有某建筑公司的项目部的公章。合同订立后,甲便将混凝土送至某建筑 1 A case leads to the question of a concrete mixing plant under the station, B for the fifth project manager of a construction company. A, B both sides signed a contract for the sale of concrete. The parties agreed that: A. A supply of concrete to the construction site of a construction company to which B is responsible, which is affixed with the official seal of the project department of a construction company in addition to B's signature. After the contract is concluded, a will be concrete to a building