King James Version (KJV)
And {there were} four undersetters to the four corners of one base: {and} the undersetters {were} of the very base itself.
Modern English
There were four supports at the four corners of each base. Its supports were of the base itself.
Hebrew
וְאַרְבַּ֣ע כְּתֵפ֔וֹת אֶ֚ל אַרְבַּ֣ע פִּנּ֔וֹת הַמְּכֹנָ֖ה הָֽאֶחָ֑ת מִן־הַמְּכֹנָ֖ה כְּתֵפֶֽיהָ׃
vʾarbaʿ ktepvot ʾel ʾarbaʿ pinvot hamkonah haʾeḥat min-hamkonah ktepeyha