Check the number of solder joints on the shrapnel. Normal products have 5 solder joints, and abnormal products have less than or greater than 5 solder joints;
Check the number of solder joints on the shrapnel. There are 5 solder joints in normal products and less than or greater than 5 solder joints in abnormal products;
Check the number of solder joints on the shrapnel. There are 5 solder joints in normal products, and the number of solder joints in abnormal products is less than or greater than 5;