Ordinary wi-fi chips, of the kind used in laptop computers, say, are intended for use primarily when static.

Barricade tape may be use primarily as a safety precaution for various industries and procedures.

Crabs and lobsters have strong walking legs, whereas shrimp have thin fragile legs which they use primarily for perching.

Another group felt strongly that this money should be used primarily for evangelism.

The house will, seems, be used primarily as a weekend retreat rather than a home.