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

→ 雙極常開(kāi) DPNO (Double Pole Normally Open)

→ 單極常開(kāi) SPNO (Single Pole Normally Open)

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

→ 無(wú)鎖 No Lock

→ 閉合鎖定 Lock-on

→ 斷開(kāi)鎖定 Lock-off