lieqiamaing floor drain is a submarine brand. Because the query of lieqiamaing registered trademark shows that lieqiamaing floor drain is a submarine brand. Submarine floor drain is a brand developed by Beijing Runde Hongtu Technology Development Co., Ltd. The main products are T-type automatic sealed four-proof floor drain, U-type double-sealed floor drain, V-type large-displacement sealed odor-proof floor drain, backflow-proof floor drain, deep-water sealed floor drain and so on.