Ambry of shake handshandle of popular science chap?
ambry crack also called net broken or cracked, cracks and connected into a tortoise shell striate irregular cracks, and the short edge length is not more than 40 cm.
in parallel to the longitudinal have intensive cracks,, though not into the net if the distance is not more than 30 cm, belong to crack, crack in area. Crack generally used in land cracked, chapped skin, exterior wall coating cracking.
this is ambry shake handshandle of science popularization of crack is introduced.