Synonyms for main lines

Electric railways placed them in connection with the main lines.

Both Varna and Bourgas are connected by railway with the main lines.

The subjoined extract will illustrate these main lines of investigation.

All the main lines of railway connect this state with the rest of the Republic.

The Master said, We shall seldom get lost if we hold to main lines.

They are of variable quality, but good on the main lines of travel.

It may be said, I think, that there are three main lines of opinion.

There are two main lines of subspeciation in Proechimys guyannensis.

Many of their main lines are deplorable; their branch lines are unspeakable.

My journal of travel is a brief one, and keeps to a few of the main lines.