This is the 3384th most frequent Chinese word.
對紐
"對紐" refers to "matching buttons or paired fasteners."
In this sentence, '對紐' is used to refer to working with buttons, likely as part of tailoring or garment creation.
他對紐接觸十分在行。
He is very skilled in dealing with buttons.
Here, '對紐' indicates the machine's functionality related to buttons, perhaps fastening them.
該機器能自動對紐完成操作。
The machine can automatically process button operations.
In this instance, '對紐' refers to the study or interest in buttons as a subject, suggesting a historical or academic context.