Stainless steel case and ring, glass lens, stainless steel internal, connection and joint, ammonia pressure gauge.
不锈钢壳，不锈钢压圈，玻璃面，不锈钢机芯，不锈钢管子，不锈钢接头。
Chrome plating steel case and ring, glass lens, brass internal and connection, Chrome plating brass joint.
电镀铁壳，电镀铁圈，玻璃面，铜机芯，铜管子。电镀铜接头。
Black steel case, black stack steel ring, glass lens, brass internal and connection, stainless steel joint.
黑铁壳，黑铁圈，玻璃面，铜机芯，铜管子，不锈钢接头。
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