Inclusion. Foreign material or non-metallic particles entrapped within the metal during solidification.

夹杂物。金属凝固过程中残留在其内部的杂质或非金属颗粒。

youdao

The seal must provide superior oil inclusion functions as well as being able to exclude foreign materials from the bearing chamber, even during wash-down.

全句的意思应该为：该密封必须有较优的油封功能，即使是在冲洗时，也要能够防止异物通过倒角侵入。

youdao

But the former foreign minister says he will not accept the results, alleging favoritism in the process for the incumbent and the inclusion of tainted votes amid widespread reports of wholesale ballot box stuffing by Karzai supporters.

VOA: standard.2009.09.11

It is the first such deal since the European Union suspended the inclusion of foreign airlines in its controversial Emissions Trading Scheme.

BBC: China agrees $8bn Airbus plane deal

Under pressure from these countries, the European authorities agreed in November to suspend the inclusion of foreign carriers in the scheme for one year.

BBC: China agrees $8bn Airbus plane deal

The British Council's director of higher education, Pat Killingley, said the inclusion of the additional foreign students was good news for UK higher education.

BBC: More overseas students 'found'