Cov Qauv Hlau
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Cov Qauv Hlau
Cov hlau ncej formwork yog ib lub tshuab hlau tshwj xeeb, tsim tshwj xeeb rau kev nchuav thiab tsim cov pob zeb cylindrical, square, thiab cov ncej tshwj xeeb. Ua cov khoom siv tseem ceeb rau kev tsim cov qauv ncej, nws muaj kev siv dav dav, ua tau raws li qhov xav tau ntawm ntau yam haujlwm suav nrog kev tsim kho, choj, thiab qhov av.