In order to prevent stress from being set up in the metal, expansion joints are fitted which _____ the stress by allowing the pipe to expand or contract freely....

In order to prevent stress from being set up in the metal, expansion joints are fitted which _____ the stress by allowing the pipe to expand or contract freely....

In order to prevent stress from being set up in the metal, expansion joints are fitted which _____ the stress by allowing the pipe to expand or contract freely....

In order to prevent stress from being set up in the metal, expansion joints are fitted which _____ the stress by allowing the pipe to expand or contract freely....