Note: The assembly will fail both the first and second check valve tests above, if shutoff No. 2 leaks excessively. To test for a leaky No. 2 shutoff, use the following procedure.

• 注意：如果2号关闭阀泄漏过于严重，则第一和第二止回阀的上述检测步骤将会失败。要检测2号关闭阀是否泄漏，请采用下列程序。