1964_IMPORT_AND_EXPORT_(STRATEGIC_COMMODITIES)_REGULATIONS — Page 33

1988 Ed.]

Import and Export (Strategic Commodities) Regulations

[CAP. 60

G 33

[Subsidiary]

IL 1365

IL 1370

(a) Specially designed equipment for manufacturing anisotropic, orthotropic or sandwich structures embargoed by Item IL 1416 (h)(3);

Technical Notes:

1. Anisotropic construction is the use of fibre reinforcing members aligned so that the load-carrying ability of the structure can be primarily orientated in the direction of expected stress.

2. Orthotropic construction is a means of stiffening plates in which the structural members are at right angles to each other.

3. Sandwich construction is the use of structural members or plates which are fabricated and permanently affixed in layers to enhance their strength and reduce their weight.

(b) Specially designed equipment for the production and testing of flexible materials for skirts, seals, air curtains, bags and fingers for surface-effect vehicles;

(c) Specially designed equipment for the production of water-screw propellers and hub assemblies and water-screw propeller systems embargoed by Item IL 1416 (e) and (f);

(d) Specially designed equipment for the production, dynamic balancing and automated testing and inspection of lift fans for surface-effect vehicles;

(e) Specially designed equipment for the production of water-jet propulsion pumps rated at 3 000 hp or greater, or multiple-pump system equivalents thereof;

(f) Specially designed equipment for the production, dynamic balancing and automatic testing of AC-AC synchronous and AC-DC systems, sectored disc and concentric-drum rotors for DC homopolar machines.

(See also Item IL 1416.)

Equipment specially designed for in-service monitoring of acoustic emissions in airborne vehicles, or underwater vehicles embargoed by Item IL 1418, capable of discriminating acoustic emissions related to crack growth from innocuous noise sources and capable of spatial location of the crack, and specially designed components, accessories and "specially designed software" therefor.

Technical Note:

The methods used for discriminating acoustic emissions from innocuous noise sources include pattern-recognition techniques.

Machine-tools for generating optical quality surfaces, specially designed components and accessories therefor, as follows, and "specially designed software" therefor

(a) Turning machines using a single point cutting tool and having all of the following characteristics:

(1) Slide positioning accuracy less (finer) than 0.0005 mm per 300 mm of travel, TIR (peak-to-peak);

(2) Slide positioning repeatability less (finer) than 0.00025 mm per 300 mm of travel, TIR (peak-to-peak);

(3) Spindle run-out (radial and axial) less than 0.0004 mm TIR (peak-to-peak);

(4) Angular deviation of the slide movement (yaw, pitch and roll) less (finer) than 2 seconds of arc (peak-to-peak) over full travels;

(5) Slide perpendicularity less than 0.001 mm per 300 mm of travel, TIR (peak-to-peak);

(b) Fly cutting machines having both of the following characteristics—

(1) Spindle run-out (radial and axial) less than 0.0004 mm TIR (peak-to-peak);

(2) Angular deviation of slide movement (yaw, pitch and roll) less (finer) than 2 seconds of arc (peak-to-peak) over full travel;

(c) Specially designed components, as follows:

(1) Spindle assemblies, consisting of spindles and bearing as a minimal assembly, except those assemblies with axial and radial axis motion measured along the spindle axis in one revolution of the spindle equal to or greater (coarser) than 0.0008 mm TIR (peak-to-peak);