tián​liào

filler; additive

填料 tián​liào
filler; additive
materials like carbon black or wood flour added to rubber, plastic, or concrete to improve performance or reduce cost
packing; stuffing
inert materials placed in a vessel such as a distillation tower or a joint to increase surface area or seal gaps

Frequency

Movie subtitles
0.300 per million appears in 0% of films
Written text
1.01 per million

Sources