... Number of Year(s) Used Condition Service Life Tester of Water-Squeezing Bucket Self-Made 3 1.0 ... Acceptable Cellulous Sponge Mop Service Life Tester Self-Made 1 2.0 Acceptable Butterfly Mop ... Water-Squeezing Service Life Tester Self-Made 1 2.0 Acceptable Spray Mechanism ... Made 1 5.0 Acceptable Plastic Carpet Wear-Resistance Tester Self-Made 1 10.0 Acceptable Production Flow ...