May 23, 2021 DOS Command learning manual
Call calls another batch file in one batch command
(1) Do not terminate the operation of existing files, return immediately after the execution of the useless program.
(2) The called batch command must be an extension of bat
(3) When calling a batch file, you can add parameters (%1-%9) and environment variables such as %baud%
(4) Pipe tools and redirect tools cannot be used