to have contact with someone or something
ひとつながりにつなげたもの
合わせること
調和している
the condition of being in harmony
the state of something being dependable
the condition of having a connection with something
They are bound together.
be compatible with
concentrating much attention and energy on something within a relatively short period of time
Became one
The counter-marks agree with each other―tally with each other.
is/are duplicated