注意！请勿开启，人员正在工作！ - 琺瑯標誌牌 - 瑪瑙, 鐵

“注意！请勿开启，人员正在工作！”——原装保加利亚共产主义时期的瓷釉金属安全标志（30 × 20 厘米）

这块来自共产主义时期保加利亚的原装瓷釉金属安全标志，传达了一个鲜明而明确的警告：
“Внимание! Не включвай работят хора!” — “注意！请勿开启，人员正在工作！”

Produced between the 1960s and 1980s, signs like this were installed near electrical substations, power rooms, factories, and industrial facilities, where exposure to live equipment posed a serious and immediate threat. The bold black lettering and striking red lightning bolt were designed to communicate danger instantly, even to those who could not read the text.

这些标志大多产自20世纪60年代至80年代之间，被安置在变电站、配电室、工厂和工业设施附近；在这些场所，暴露于带电设备的危险是严重且直接的威胁。粗黑的字体和醒目的红色闪电符号设计用来瞬间传达危险信息，即使对那些不会读文字的人也能一目了然。

What makes this piece especially collectible is its original vitreous enamel construction, a costly and durable method used at the time to ensure long-term visibility in harsh industrial environments. Many such signs were damaged, replaced, or discarded as technology and safety standards changed, making surviving examples increasingly uncommon.

这件作品之所以特别具有收藏价值，在于它采用原装的玻璃釉质瓷釉结构——当时一种成本高昂、耐用的制造工艺，能够在恶劣的工业环境中长期保持清晰可见。随着技术和安全标准的变更，许多同类标志遭受损坏、被更换或被丢弃，现存的样品因此日渐罕见。

Today, this sign stands as a powerful visual reminder of a time when electricity was expanding rapidly across industry—and safety warnings carried life-or-death importance. It is both a compelling historical artifact and a strong example of mid-20th-century industrial graphic design.

如今，这块标志成为一个强有力的视觉提醒，见证那个电力在产业中迅速扩张、而安全警告关系生死存亡的时代。它既是引人入胜的历史文物，也是一件20世纪中叶工业平面设计的经典范例。

A rare and authentic piece for collectors of vintage safety signage, industrial design, or Eastern European Cold War history.

对于收藏老式安全标志、工业设计或东欧冷战史的收藏家而言，这是一件罕见且正宗的藏品。