Machine
Mechanism
noun
A machine contraption is just a machine
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
こちらは、地面に穴をほる機械で、そちらは、はりの穴に糸を通す機械です。
This is a machine for digging holes in the ground and that's a machine for threading needles.
今日は機械の調子があんまり良くないんだよね。
Today the machine is not working very smoothly.
コウイチは会社用にバッティングセンターの機械を買ったの？
Did Koichi buy a batting cage machine for the office?