कठोरता (en. Tightness)

tightness without the use of additional means (sealants, gaskets).

We will run you through this process in 8 steps: calculating the dimensions of the dome, digging the hole, setting the conical slab foundation, building the dome, ensuring air and water tightness, constructing the inlet, constructing the outlet, and backfilling with soil.

2. Wheezing, cough, shortness of breath, chest tightness, and difficulty breathing are symptoms of asthma.

Chest tightness, pain or pressure.

Double Layer To Guarantee Air Tightness.

Multi-chamber design that gives air tightness.

Air and water tightness, safety in electrical storms.