plug seat

基本解释

The main reason is (1) Plug and seat stick, can be done manually to exclude the exhaust test;
主要原因是（1）阀芯与阀座粘住，可做手动排气试验排除；
The unique ram-style plug & seat provide reliable, tight shut off. All HST valves are covered by a 36 month prorated warranty.
独特的柱塞式设计，小巧、方便，所有止流阀均有36个月的保修期。
www.e-gtm.com.cn
The utility model discloses a voltage-regulating and energy-saving plug seat for domestic appliances, having the advantages of convenient operation, high efficiency and energy saving.
本实用新型为家用电器提供一种调压节能、使用方便的插头座。
ip.com