attached Australia chain clamped clamps concrete double-sided drying edges edging gray grey hand-wringer handle heavy historic history laundry laundry-trough manual metal old olden-days pioneering plumbing plumbing-fixtures pump ribbed squeeze squeezing stand trough wall washing-board washroom wood wooden-wall wooden-washing-tongs wringer bucket clean cleaning cleanliness cleanness cleanup deterioration disinfect disinfection foot-pedal galvanised galvanized health hygiene hygienics maneuvrability manoeuvrability metal-mechanism mobility mop mop-bucket mop-pail mopping roller-wringer-mop-bucket rust rusty sanitation sanitising sanitizing steel-wringing-system treatment washing wringer-mop-bucket