We keep up a certain trade, I suppose you'd call it.

The authorities recently announced a tax break for private businesses that employ jobless workers in certain trades.

He has the mark of a certain trade or occupation that no longer exists.

Students can receive a high school diploma, but most do not, instead staying only long enough to obtain a certificate in a certain trade.

Soon, entire islands began to specialize in certain skilled trades.

Johnson wants to return to Arizona, where he lives, and it seems certain the trade will go through.

However, certain trades have their own particular qualifications in addition to the above.

At first, the scheme only applied to certain trades but, in 1920, it was expanded to include most manual workers.

Craft societies had small amounts of members and were restricted to a certain trade in a certain town.

The founder of the town was especially interested in the inhabitants learning certain trades, among them craftwork.