degree of hardness वाक्य

In 1795 in France, Jacques Conte ushered in the modern pencil industry by using clay as a binder with refined graphite powder and altering the mix of both to produce variations in degrees of hardness in leads.
Seemingly, the roofs were supported by a number of pillars, which the dripping of ages had concreted into all shapes and sizes and into all degrees of hardness, from patches of soft silvered powder to the bold undulated columnar stalactite.
Currently, Kamui Tips produces two styles of tips : " Kamui Black " and " Kamui " . " Kamui Black " tips come in four degrees of hardness : super soft, soft, medium and hard . " Kamui " tips come in four different hardnesses : soft, medium soft, medium and hard.