Final answer:
Products used to trace delinquent shipments include gamma ray-, x-ray-, and neutron-scanning devices, which customs officers use to inspect the contents of vehicles. These devices can help in locating missing or delayed cargo. Additionally, tracking physical items is part of measuring the balance of trade.
Step-by-step explanation:
To trace delinquent shipments, various products are employed that utilize advanced technology to identify and locate cargo that has not arrived at its intended destination on time. One such method mentioned in the provided reference includes the use of gamma-ray-, x-ray-, or neutron-scanning devices which can be operated by customs officers to reveal the contents of trucks and cars and potentially locate shipments that are missing or delayed.
These scanning technologies can penetrate through different materials to provide images or readings that help reveal the presence and condition of cargo within sealed containers.
Additionally, it's worth mentioning that the economic measurement for tracking the solid or physical items transported between countries is known as the balance of trade. This figure is crucial for economists who monitor the import and export values to determine a country's economic status.