(Koysher-קושר‎ Ep. 18) (#650) Important cases with the same action of tying sometimes allowed and sometimes not allowed.

floor Drain with Hinges or Handle, Shelf in a Bookcase with Hinges, and the Use of a High Riser or Sofa Bed on Shabbos;

Putting Down an Item on the Table During סעודה שלישית if It Will Only Be Used After Nightfall. Taking Clothing Out of the Closet...

דבר דבר (Dabair Davar): A Possible Distinction Between Two Types of מצות (Mitzvos);