hollow pin; picking head 细胞学

[gospatent]

Подскажите, пожалуйста, наиболее адекватный перевод терминов hollow pin и picking head в следующем контексте:

A method for automated picking of animal cell colonies using an apparatus, comprising:
a) providing a picking head comprising a plurality of hollow pins, the picking head being movable over the apparatus using positioning motors;
b) placing a sample container including a plurality of animal cell colonies held in a medium onto the apparatus, and also a dispensing container;
c) using machine vision and image processing to identify animal cell colony locations in the sample;
d) moving the picking head to above the sample container;
e) picking an animal cell colony by aligning one of the hollow pins with one of the animal cell colony locations, introducing a distal end of the hollow pin into the medium, and aspirating the animal cell colony at that location into the hollow pin; and
f) dispensing the picked animal cell colony by moving the picking head to above the dispensing container and expelling the picked animal cell colony into the dispensing container.

Речь идет о приборе -автоматическом сортере колоний животных клеток (и о методе, использующем данный прибор).

Спасибо!