A knee [shaped] key (this was a key with 90 degree curved bend in its shaft)

which broke in its knee (i.e. the shaft broke at the point of this curve)

[the part with the handle] is tahor;

Rabbi Yehuda ruled it is tamei

because one can unlock with it from inside.

And of [a key shaped like the Greek letter] gamma (a gamma looks like an upside-down L; as opposed to the curved 'knee' shape above, the shaft of this one makes a sharper 90 degree bend)

that broke at [the bend of] its gamma

is tahor (due to the sharp angle, it cannot even be used to unlock from the inside);

if it had teeth and holes (this is the part of the key that goes into the lock and moves the bolt, as opposed to the part with the handle, which had been discussed until now; some locks could be opened with teeth, others required a key with holes, the key referred to here would work with either type)

is tamei (as it can still be used to unlock the door);

if its teeth were removed

it is tamei because of the holes,

if the holes were sealed

it is tamei because of the teeth.

If the teeth were removed

and the holes sealed

or [the holes] broke into each other

it is tahor.

A mustard strainer

in which three bottom holes broke

into each other (to make one large hole

is tahor (as it can no longer strain properly).

and the grider's hopper (this was a shute, wide at the top and narrow at the bottom, which fed grain into the mill) made of metal

is tamei (it is deemed an independently significant utensil with its own name).

פרק טו משנה א

Wooden utensils,

leather utensils,

bone utensils,

and glass utensils,

the flat ones are tahor

and the hollow ones are tamei;

if they break they become tahor,

if one goes and makes a utensil from them

they are susceptible to tumah from then on.

A bin (made of wood, this large box was used to store grain),

and the chest (a more generic storage box),

and the cabinet (which was taller and used to store housewares and clothing),

a straw basket

and a reed basket (these two have the status of wood),

and the cistern of an Alexandrian ship (a large wooden tank used in large ships to store drinking water),

that have bottoms (that is, theses vessels have wide flat bottoms that allow them to be rested on the ground)

and they can hold forty liquid se'ahs (approximately 180 gallons)

which are two kors of dry goods (sixty se'ahs in volume, it is the equivalent as dry goods can be piled up above the rim of the container)

these are tahor; (it must be usual for a a container to be carried while full for it to be susceptible to tumah, which these are not)

and all other utensils,

whether they hold [this volume]

whether they do not hold [this volume]

are tamei, (unless one is certain that it is of a type that is not carried while full)

these are the words of Rabbi Meir.

Rabbi Yehuda says

a wagon's barrel (used to store water on a wagon, this held forty liquid se'ahs)

and the provision chests of kings (compartmented wooden cabinets used to store provisions in a kings coach),

an tanner's trough (used for soaking hides),

and the cistern of a small ship,

and the coffin,

even though they hold [forty liquid se'ahs]

they are tamei

as they are not made to be carried

except with what is inside them,

and all other utensils

that hold [forty liquid se'ahs] are tahor

that do not hold [forty liquid se'ahs] are tamai.

There is not difference between the words of Rabbi Meir

to the words of Rabbi Yehuda

except for the kneading trough of a householder (which was only rarely moved while full, R' Meir held was tamei, even though it held forty liquid se'ahs, and R' Yehuda held was tahor)