The first name is that of the main chain.

It runs north-south for approximately 600 km, parallel to the main chain.

Many polymers are strengthened by hydrogen bonds in their main chains.

I can't make out how she got there, but her transom's tucked hard up against our larboard side at the main chains.

The range forms a part of the main chain of the Alps.

It is also the highest summit in the Alps lying outside the main chain, or watershed.

The European watershed lies in fact only partially on the main chain.

Harris stood at the main chains staring into the darkness.

The entire main chain is today part of Slovenia.

She reflected on that, in a momentary diversion from her main chain of thought.