◆ 可選帶以下功能： Optional with the function as follows:

→ 雙極常開 DPNO (Double Pole Normally Open)

→ 單極常開 SPNO (Single Pole Normally Open)

◆ 可選帶以下鎖定類型： Optional with Following lock types:

→ 無鎖 No Lock

→ 閉合鎖定 Lock-on

→ 斷開鎖定 Lock-off