Please refer to the ContractSpecification for details of the spread on each product.
有关各类产品的价差详情请参见《合约细则》。
2
Other matters not provided herein can be performed as per the contractspecification or conducted by negotiation together.
其它未尽事项可按合同规定执行或共同协商进行！
3
The contractspecification for BankAccount includes a class-wide invariant that the balance must always be greater than or equal to zero (sorry, no overdrafts allowed!).