Mechani cal types of relays are made as open or sealed units;
继电器的机械类型要么是敞开的，要么是密闭的；
Units with a general accountant should also have their accounting reports signed or sealed by him or her.
在企业单位，应该有高级工程师、工程师，总会计师、会计师等职称。
Units with a general accountant should also have their accounting reports signed or sealed by him or her.
在企业单位，应该有高级工程师、工程师，总会计师、会计师等职称。
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