A comb for flax (this has a wooden body and metal teeth)

whose teeth were removed

and two teeth were left in it (even if they are not adjacent)

is tamei (as it can still be used to comb flax);

and [if only] one [tooth was left] is tahor;

and all of them [the teeth],

each one by itself (i.e. a tooth that was removed from this comb)

are tamei (as one can be used as a stylus for a wax tablet).

And [a comb] for wool

whose teeth were removed

one between them (i.e. if every other tooth was removed)

is tahor (as it cannot properly comb wool, which is more tangled than flax);

if there was left in it

three [teeth] in one spot

it is tamei;

if the outer one (the outer teeth were thicker, and thus do not really help comb the wool)

was one of them (the aforementioned three teeth)

it is tahor;

if two were removed from it

and one made them into tweezers

they are tamei;

one [tooth that was removed]

and one prepared it to [use as a tool to clean out] a lamp or [to use as a pin] to stretch [fabric]

it is tamei.

פרק יד משנה א

Metal utensils

what is their measure (such that if broken, they will still be susceptible to tumah)?

The bucket,

sufficient to draw [water from a well] with;

a kettle,

sufficient to heat water with;

a boiler,

sufficient to hold selas (boilers were sometimes used to store these coins);

the stewpot (which was also used to heat water and clean in it small ladles),

sufficient to hold ladles;

ladles,

sufficient to hold perutahs (they were sometimes used to store these coins).

Wine measures with wine (i.e. vessels used to measure wine will remain tamei after being damaged if they can still hold wine sufficiently to measure it)

and oil measures with oil;

Rabbi Eliezer says

all of them with perutahs (he holds that these measuring vessels were sometimes also used to store coins).

Rabbi Akiva says

[a newly made utensil] that is lacking a cover

is tamei (even though the manufacturing process hasn't yet been completed, as the vessel is meant to have its cover),

and that which is lacking hammering (the final manufacturing step that requires the skill of a craftsman)

is tahor.