1. A fuel injection system in internal combustion engines that uses a mechanical pump to deliver fuel at controlled pressure and timing, without electronic components
The older diesel engine relied on mechanical pump injection for fuel delivery.
O motor diesel mais antigo dependia da injeção por bomba mecânica para a entrega de combustível.
2. In medical contexts, the administration of a substance (medication, contrast agent, etc.) using a mechanical pump device rather than manual or electronic means
The radiologist used mechanical pump injection to administer the contrast medium.
O radiologista usou injeção por bomba mecânica para administrar o meio de contraste.