'if combined' is correct and usable in written English.
You can use it to make hypothetical statements, for example: "If combined with the right ingredients, this recipe can be a delicious dish".
If combined, the two companies would distribute 41% of music sold worldwide.
The method may prove useful if combined with other similar earthquake forerunner tools.
A design based on stochastic simulations is recommended especially if combined systems are to be designed.
Self-healing based on microcapsules can deliver further results if combined with intrinsic self-healing.
All these multiple benefits, if combined can assist in the fight against hunger and poverty.
Are there elements in each one that if combined might reflect your sense of purpose?
To the French it seems acceptable only if combined with soothing talk of "nation-states".
If combined with stronger growth abroad, then the current-account deficit could slowly shrink.
Even so, it would not break the bank, especially if combined with issuing new equity.
The enviro pig came about through gene manipulation, but if combined with cloning, its green potential could be maximised.
Shaw called music the brandy of the damned, and it's all the more addictive if combined with heroin and cocaine.
