In addition, by can also mean "due to, through and via" in the contract. For example, in some contracts involving transportation, by can indicate which mode of transportation to take to complete the transportation. The accurate compilation of this information can clarify the specific content of the responsibilities of all parties.
By can also represent the work task completed through cooperation, which is the premise of the completion of the work task. For example, when enterprises cooperate to launch a new product, they need to complete their respective responsibilities according to the contract, so that the new product can be successfully launched and the cooperation goals of both parties can be achieved.