刷pos機英語：

Brush pos machine

pos機可以譯作：a pos terminal

POS用英語說應該是Point of sale (POS)

中文說明：

銷售終端－pos（point of sale）是一種多功能終端，把它安裝在信用卡的特約商戶和受理網(wǎng)點中與計算機聯(lián)成網(wǎng)絡，就能實現(xiàn)電子資金自動轉帳，它具有支持消費、預授權、余額查詢和轉帳等功能，使用起來安全、快捷、可靠。

英文說明：

Point of sale (POS) (also sometimes referred to as Point of purchase (POP) ) or checkout is the location where a transaction occurs. A "checkout" refers to a POS terminal or more generally to the hardware and software used for checkouts, the equivalent of an electronic cash register.