The phrase "long term relation" is correct and can be used in written English.
You can use it to refer to a sustained or enduring connection between two or more parties. For example, "The company and the customers have worked together in a long term relation for more than 20 years."
Servitization of manufacturing is getting more importance in our global economy due to the need of manufacturing companies to maintain their sustainability, promoting this way a more long term relation with their customers, and innovating and supplying added value with their products.
Phenomenography has been used for health research, for instance attitudes towards physical activity among people with rheumatoid arthritis [ 18] or patients' long term relation to their asthma-allergy [ 19].
Recent debates on informal economic activities have partially switched away from a pure monetary logic towards a more complex one, embedded in long term relations and reckoning with non materialistic paradigms.
Religious leaders were engaged to consider what long term relations could be built up within the community.
Furthermore, the career patterns of policy-makers are often not compatible with strong research utilisation if the latter depends on developing long term relations to boost receptivity.
On the other hand for some young women were motivated to use contraceptives to avoid the burden of pregnancy and preserve themselves for long term relations.
Since defectors are never able to establish social ties under mutual agreement, they are overall swifter than cooperators, who tend to evolve stable and long term relations when the risk of exploitation is absent.
We used prospective dyadic data to examine the short- and long-term relation between SEIM use, sexual satisfaction, and relationship adjustment among adult SEIM users and their partners.
We found that long-term averages from this axis were useful to identify a wetland's long-term relation to surface and groundwater.
The long-term relation between EUV irradiance and F10.7 has been changed remarkably during the recent year, with EUV irradiance decreasing more rapidly than F10.7 proxy (Emmert et al. 2010).
It is also necessary to explore implicit benefits of crowdsourcing such as marketing, public relation, intelligence, building long-term relation with participants, and probably most importantly shifting locus of cost of ideation from firms to crowds.
