The Optimum Drain Assembly consists of a solid-state timer coupled to a solenoid valve.
2
有的公司为了增大冲厕时的冲力,投入巨额资金研发大口径的虹吸式电磁阀作下水阀。
Some company for enlarging blunt Ci of momentum, devotion a huge sum of funds development big caliber of the Hong absorb type electromagnetism valve make watering valve.