你可以花20美元,聘请由美国环保署认证的公司帮你测试。
Hydraulic and mechanical performance guarantees shall be based on water testing.水力的和机械的运转保证将以水测试为基础。
Alternating hot and cold water testing more than 6000 times (90 degree water and 15 degree water).冷热水交替冲击测试超过6000次(90度热水与15度冷水)。