CREATE TABLE table_38006 ("Unit" CLOB, "Russian" CLOB, "Ratio" CLOB, "Metric value" CLOB, "Avoirdupois value" CLOB)

What Russian has an Avoirdupois value of 0.686 gr?
SELECT "Russian" FROM table_38006 WHERE "Avoirdupois value" = '0.686 gr'
SELECT "Russian" FROM "table_38006" WHERE "Avoirdupois value" = '0.686 gr'