Stores its record size at a specific address, if this is the first project linkage.
如果这是第一个项目链接，将其记录大小存储到一个特定的地址。
If it isn't the first project linkage, it finds the next available address and stores the size there.
如果不是第一个项目链接，它会寻找下一个可用地址并将该大小存储到那里。
To address a record in the LINKAGE SECTION, pass an argument to the program and specify the record in an appropriate position in the USING phrase in the program.
要检索LINKAGE SECTION中的记录，则需要向程序传递一个参数，并在该程序的USING部分的相应位置上指定该记录。
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