ST_TAB_WATER_LEVEL
if (ST_TAB_WATER_LEVEL(ifs) <=
if (ST_TAB_WATER_LEVEL(ifs) <=
if (ST_TAB_WATER_LEVEL(ifs) > ifs->ifs_state_flush_level_hi)
if (ST_TAB_WATER_LEVEL(ifs) > ifs->ifs_state_flush_level_hi)
if (ST_TAB_WATER_LEVEL(ifs) > ifs->ifs_state_flush_level_hi)