On alternating strokes the spacer shifted back out of the cylinder; therefore, no contact was made between piston and striker arm. [Please select]
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This device shifted a small spacer between the piston and the striker arm of the exhaust-valve rod, permitting the piston to push open the exhaust valve. [Please select]
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To make the pipe sleeve serve also as a spacer the end next the face may be capped with a wooden washer which is removed and the hole plastered when the forms are taken down. [Please select]
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